JP5579338B1 - Terminal, wire harness, wire harness structure, and method for connecting terminal and coated conductor - Google Patents

Terminal, wire harness, wire harness structure, and method for connecting terminal and coated conductor Download PDF

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JP5579338B1
JP5579338B1 JP2014076746A JP2014076746A JP5579338B1 JP 5579338 B1 JP5579338 B1 JP 5579338B1 JP 2014076746 A JP2014076746 A JP 2014076746A JP 2014076746 A JP2014076746 A JP 2014076746A JP 5579338 B1 JP5579338 B1 JP 5579338B1
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crimping
terminal
conductor
electric wire
coated
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JP2014187021A (en
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幸大 川村
翔 外池
博 折戸
泰 木原
拓郎 山田
小澤  正和
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古河電気工業株式会社
古河As株式会社
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/188Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • H01R4/203Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve having an uneven wire-receiving surface to improve the contact
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/52Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/058Crimping mandrels

Abstract

【課題】 コスト上昇を抑えることができ、かつ、電線と圧着端子との接触部分への水分の浸入を防止可能なワイヤハーネス等を提供する。
【解決手段】 本発明では、凹部25が環状に形成されるため、圧縮前の状態で、金型同士の合わせ部の位置には必ず凹部25が位置することとなる。この状態で、圧着を行うと、凹部25の周囲の導体が凹部25の方向に流動する。のため、導体が、外方に流動することを抑制することができる。このように、被覆圧着部24が外部に流動して突起を形成することがないため、被覆圧着部24の内面には、窪みなどの凹凸が形成されることがない。したがって、被覆圧着部24の内面全体で略均一に絶縁被覆部12を圧縮することができる。この結果、上下の金型の合わせ部35近傍においても、被覆圧着部24と絶縁被覆部12との間の水密が悪化することがない。
【選択図】図21
PROBLEM TO BE SOLVED: To provide a wire harness or the like that can suppress an increase in cost and can prevent moisture from entering a contact portion between an electric wire and a crimp terminal.
In the present invention, since the concave portion 25 is formed in an annular shape, the concave portion 25 is always located at the position of the mating portion between the dies before compression. When crimping is performed in this state, the conductor around the recess 25 flows in the direction of the recess 25. Therefore, the conductor can be prevented from flowing outward. As described above, since the coated crimping part 24 does not flow to the outside to form protrusions, irregularities such as depressions are not formed on the inner surface of the coated crimped part 24. Therefore, the insulating coating portion 12 can be compressed substantially uniformly over the entire inner surface of the coating crimping portion 24. As a result, the watertightness between the coated crimping portion 24 and the insulating coating portion 12 does not deteriorate even in the vicinity of the mating portion 35 of the upper and lower molds.
[Selection] Figure 21

Description

本発明は、圧着により被覆電線と電気的に接続される端子等に関する。   The present invention relates to a terminal or the like that is electrically connected to a covered electric wire by crimping.

ワイヤハーネスは、自動車の車体に配索され、当該自動車が備える各種電気機器への電力供給、電気機器間の制御信号の通信等に利用される。ワイヤハーネスは、束ねられた複数の被覆電線、及びこれらの被覆電線に接続された端子から構成される。   The wire harness is routed in the body of an automobile, and is used for supplying power to various electric devices included in the automobile, communicating control signals between the electric devices, and the like. The wire harness includes a plurality of bundled covered electric wires and terminals connected to the covered electric wires.

圧着端子を用いる場合、導体部が腐食することを防止するために、圧着端子の隙間からの浸水及び被覆電線と圧着端子の境界部分からの浸水を防ぐ必要がある。特に、圧着端子と導体部とで異なる金属を用いる場合、電食を発生させないためにも、浸水を確実に防止する必要がある。特許文献1及び2は、この種の技術を開示する。   When using a crimp terminal, in order to prevent the conductor portion from corroding, it is necessary to prevent water from entering the gap between the crimp terminals and water from the boundary portion between the covered electric wire and the crimp terminal. In particular, when different metals are used for the crimp terminal and the conductor portion, it is necessary to reliably prevent water immersion in order not to cause electrolytic corrosion. Patent Documents 1 and 2 disclose this type of technology.

特許文献1では、被覆電線の導体部を圧着端子に圧着した時点では、複数箇所において導体部が露出している。特許文献1では、この複数の電線の露出箇所をまとめてモールド樹脂で覆うことで防水を行う技術が開示されている。なお、特許文献2では、導体部の露出部分のみを覆うように樹脂を塗布し、防水を行う技術が開示されている。   In Patent Literature 1, when the conductor portion of the covered electric wire is crimped to the crimp terminal, the conductor portion is exposed at a plurality of locations. Patent Document 1 discloses a technique for waterproofing by covering the exposed portions of the plurality of electric wires together with a mold resin. Patent Document 2 discloses a technique for waterproofing by applying a resin so as to cover only an exposed portion of a conductor portion.

また、電線の導体部が酸化して酸化膜が形成されている場合、圧着端子と電線を圧着により接続しても、導通を良好に確保できない可能性がある。この点、特許文献3では、圧着端子の表面に溝を形成し、溝の縁部分を導体部に押し付けることで、酸化膜を剥がして導通を良好にする技術が開示されている。   Moreover, when the conductor part of an electric wire is oxidized and the oxide film is formed, even if it connects a crimp terminal and an electric wire by crimping, favorable conduction | electrical_connection may not be securable. In this regard, Patent Document 3 discloses a technique in which a groove is formed on the surface of a crimp terminal and an edge portion of the groove is pressed against a conductor portion to peel off an oxide film to improve conduction.

特開2001−162647号公報JP 2001-162647 A 特開2010−108828号公報JP 2010-108828 A 特開2010−3584号公報JP 2010-3584 A

しかし、特許文献1及び2で示された技術は、樹脂自体のコスト、樹脂を塗布する設備のコスト、樹脂を塗布する作業のコスト等が必要となり、高コストである。   However, the techniques disclosed in Patent Documents 1 and 2 are expensive because the cost of the resin itself, the cost of equipment for applying the resin, the cost of the operation of applying the resin, and the like are necessary.

一方、特許文献3で示された技術は、導通の確保を目的とするものであり、圧着端子の防水性とは無関係である。   On the other hand, the technique disclosed in Patent Document 3 is intended to ensure conduction, and is not related to the waterproofness of the crimp terminal.

本発明は以上の事情に鑑みてされたものであり、その主要な目的は、樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能な端子等を提供することにある。   The present invention has been made in view of the above circumstances, and its main purpose is to prevent moisture from adhering to the contact portion with the electric wire without using a resin material, and to simplify the manufacturing process. It is to provide a terminal or the like capable of achieving the above.

前述した目的を達するために第1の発明は、端子と被覆導線との接続方法であって、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記圧着部を押圧する、上下に対向する上金型と下金型を用い、前記圧着部の外周面には、前記上金型と前記下金型の合わせ部に対応する位置にあらかじめ凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されず、前記圧着部に前記被覆導線を挿入し、前記上金型と前記下金型によって前記被覆導線の被覆部を前記圧着部で圧着することで、前記圧着部の外周面の前記合わせ部に対応する位置に突起が形成されることを防止可能であることを特徴とする端子と被覆導線の接続方法である。   In order to achieve the above-mentioned object, the first invention is a method of connecting a terminal and a coated conductor, wherein the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body, and the crimping portion. The other part is sealed except for the part into which the coated conductor is inserted, and the upper and lower opposed upper and lower molds are used to press the crimp part, and the outer peripheral surface of the crimp part Is formed in advance with a concave portion at a position corresponding to the mating portion of the upper mold and the lower mold, and the inner circumferential surface of the crimping portion corresponding to the concave portion is not formed with irregularities. By inserting the coated conducting wire and crimping the coated portion of the coated conducting wire with the crimping portion by the upper die and the lower die, a protrusion is formed at a position corresponding to the mating portion on the outer peripheral surface of the crimping portion. How to connect terminals and coated conductors characterized in that they can be prevented from forming It is.

前記凹部は、前記圧着部の合わせ部に沿って、長手方向に連続して形成されてもよい。   The concave portion may be formed continuously in the longitudinal direction along the mating portion of the crimping portion.

前記凹部は、前記圧着部の周方向に連続して形成されてもよい。   The concave portion may be formed continuously in the circumferential direction of the crimping portion.

第1の発明によれば、被覆圧着部が外部に流動して突起を形成することが抑制されるため、被覆圧着部の内面には、窪みなどの凹凸が形成されることが抑制される。したがって、被覆圧着部の内面全体で略均一に被覆部を圧縮することができる。この結果、上下の金型の合わせ部近傍においても、被覆圧着部と被覆部との間の水密が悪化することがない。   According to the first invention, since the coated crimping portion is prevented from flowing to the outside to form protrusions, the formation of irregularities such as depressions on the inner surface of the coated crimped portion is suppressed. Therefore, the covering portion can be compressed substantially uniformly over the entire inner surface of the covering pressure-bonding portion. As a result, watertightness between the coated crimping part and the covering part does not deteriorate even in the vicinity of the mating part of the upper and lower molds.

また、凹部は、外周面の一部にのみ形成してもよいが、周方向に連続して形成してもよい。このようにすることで、被覆圧着部が長手方向に逃げやすくなる。このため、端子の伸びを抑制することができる。   Moreover, although a recessed part may be formed only in a part of outer peripheral surface, you may form continuously in the circumferential direction. By doing in this way, a covering crimping part becomes easy to escape in the longitudinal direction. For this reason, elongation of the terminal can be suppressed.

第2の発明は、被覆導線と端子とが接続されるワイヤハーネスであって、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記圧着部の外周面には凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されず、前記圧着部に前記被覆導線を挿入して前記被覆導線の被覆部を前記圧着部で圧着することで、前記凹部が圧縮されることを特徴とするワイヤハーネスである。   2nd invention is a wire harness to which a covered conducting wire and a terminal are connected, and the terminal has a crimping part to which the covering conducting wire is crimped, and a terminal body, and the crimping part is the covering Except for the part where the conducting wire is inserted, the other part is sealed, the concave part is formed on the outer peripheral surface of the crimp part, and the concave and convex part is formed on the inner peripheral surface of the crimp part corresponding to the concave part. The wire harness is characterized in that the concave portion is compressed by inserting the coated conductor into the crimping portion and crimping the coated portion of the coated conductor with the crimping portion.

前記被覆導線はアルミニウム系材料で構成され、前記圧着部が銅系材料で構成されてもよい。   The covered conductor may be made of an aluminum-based material, and the crimp portion may be made of a copper-based material.

第2の発明によれば、圧着時に使用される上金型と下金型との合わせ部において、圧着部の外周面への突起が形成されることがない。このため、圧着部の内面に、凹み等が形成されることを防止することができる。したがって、圧着部と被覆部とを確実に密着させて、水密性を有するワイヤハーネスを得ることができる。   According to the second invention, no protrusion to the outer peripheral surface of the crimping part is formed at the mating part of the upper mold and the lower mold used at the time of crimping. For this reason, it can prevent that a dent etc. are formed in the inner surface of a crimping | compression-bonding part. Therefore, the crimping part and the covering part can be securely adhered to each other, and a wire harness having water tightness can be obtained.

第3の発明は、被覆導線と接続される端子であって、前記被覆導線が圧着される圧着部と、端子本体と、を有し、前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記圧着部の外周面には凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されないことを特徴とする端子である。   3rd invention is a terminal connected with a covering conducting wire, Comprising: It has a crimping part to which the above-mentioned covering conducting wire is crimped, and a terminal main part, and the above-mentioned crimping part has a part into which the above-mentioned covering conducting wire is inserted. The terminal is characterized in that other parts are sealed, a concave portion is formed on the outer peripheral surface of the crimping portion, and no concave and convex portions are formed on the inner peripheral surface of the crimping portion corresponding to the concave portion. is there.

第3の発明によれば、圧着時に、上下の金型の合わせ部において、外周面への突起の形成を防止し、内周面に凹みが形成されることを防止することが可能な端子を得ることができる。   According to the third invention, at the time of crimping, a terminal capable of preventing the formation of protrusions on the outer peripheral surface and preventing the formation of a dent on the inner peripheral surface at the mating portion of the upper and lower molds. Can be obtained.

第4の発明は、複数本のワイヤハーネスが束ねられたワイヤハーネス構造体であって、
前記ワイヤハーネスは、被覆導線と端子とが接続されており、
前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
前記圧着部の外周面には凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されず、
前記圧着部に前記被覆導線を挿入して前記被覆導線の被覆部を前記圧着部で圧着することで、前記凹部が圧縮されることを特徴とするワイヤハーネス構造体である。
A fourth invention is a wire harness structure in which a plurality of wire harnesses are bundled,
The wire harness is connected to a coated conductor and a terminal,
The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
The crimping part is sealed except for the part where the covered conductor is inserted,
A concave portion is formed on the outer peripheral surface of the crimp portion, and no irregularities are formed on the inner peripheral surface of the crimp portion corresponding to the concave portion,
The wire harness structure is characterized in that the recessed portion is compressed by inserting the coated conductor into the crimp section and crimping the coated section of the coated conductor with the crimp section.

本発明では、複数本のワイヤハーネスを束ねて用いることもできる。   In the present invention, a plurality of wire harnesses can be bundled and used.

本発明によれば、樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能な端子等を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the terminal etc. which can prevent the adhesion | attachment of the water | moisture content to a contact part with an electric wire without using a resin material, and can aim at the simplification of a manufacturing process can be provided.

図1(a)は、本発明の一実施形態に係る端子付き電線の構成を示す分解斜視図、図1(b)はその組立外観斜視図。Fig.1 (a) is an exploded perspective view which shows the structure of the electric wire with a terminal which concerns on one Embodiment of this invention, FIG.1 (b) is the assembly external appearance perspective view. 図2(a)は、圧着端子の断面斜視図、図2(b)はその側面断面図。2A is a cross-sectional perspective view of the crimp terminal, and FIG. 2B is a side cross-sectional view thereof. 図3(a)は、圧着端子の内壁面の形状を示す展開図、図3(b)はその断面図。FIG. 3A is a development view showing the shape of the inner wall surface of the crimp terminal, and FIG. 3B is a sectional view thereof. 図4(a)、図4(b)は、圧着端子と被覆電線とを接続する工程を示す側面断面図。4 (a) and 4 (b) are side cross-sectional views showing a process of connecting a crimp terminal and a covered electric wire. 図5(a)は、圧着端子の内壁面の他の形状を示す展開図、図5(b)はその断面図。Fig.5 (a) is an expanded view which shows the other shape of the inner wall face of a crimp terminal, FIG.5 (b) is the sectional drawing. 図6(a)は、圧着端子の内壁面の他の形状を示す展開図、図6(b)はその断面図。FIG. 6A is a developed view showing another shape of the inner wall surface of the crimp terminal, and FIG. 6B is a sectional view thereof. 図7(a)、図7(b)は、それぞれ圧着端子の内壁面の他の形状を示す側面断面図。7A and 7B are side sectional views showing other shapes of the inner wall surface of the crimp terminal. 図8(a)、図8(b)は、変形例における圧着端子と被覆電線とを接続する工程を示す側面断面図。FIG. 8A and FIG. 8B are side cross-sectional views showing a process of connecting a crimp terminal and a covered electric wire in a modified example. 変形例における圧着端子と被覆電線とを示す分解斜視図。The disassembled perspective view which shows the crimp terminal and covered electric wire in a modification. 圧着端子10aの部分展開図。The partial expanded view of the crimp terminal 10a. 圧着端子10aの部分断面図。The fragmentary sectional view of the crimp terminal 10a. 図12(a)、図12(b)は、変形例における圧着端子と被覆電線とを接続する工程を示す側面断面図。12 (a) and 12 (b) are side cross-sectional views showing a process of connecting a crimp terminal and a covered electric wire in a modified example. 試験装置を示す概略図。Schematic which shows a test apparatus. 端子付き電線1aの断面図。Sectional drawing of the electric wire 1a with a terminal. 図15(a)は、エア溜り27を示す図、図15(b)は凸部25を設けた状態を示す図。FIG. 15A is a view showing the air reservoir 27, and FIG. 15B is a view showing a state in which the convex portion 25 is provided. 圧着端子10bの部分展開図。The partial expanded view of the crimp terminal 10b. 図17(a)、図17(b)は、変形例における圧着端子と被覆電線とを接続する工程を示す側面断面図。FIG. 17A and FIG. 17B are side cross-sectional views showing a process of connecting a crimp terminal and a covered electric wire in a modified example. 圧着端子10cの部分展開図。The partial expanded view of the crimp terminal 10c. 端子付き電線1bを示す分解斜視図。The disassembled perspective view which shows the electric wire 1b with a terminal. 圧着端子10dの断面図。Sectional drawing of the crimp terminal 10d. 端子付き電線1bの断面図。Sectional drawing of the electric wire 1b with a terminal. 端子付き電線1aの断面図を圧着工具で圧着する方法を示す図。The figure which shows the method of crimping | bonding sectional drawing of the electric wire with terminal 1a with a crimping tool. 第1圧着型61と第2圧着型62の形状を示す図。The figure which shows the shape of the 1st crimping | compression-bonding die 61 and the 2nd crimping | compression-bonding die 62. 合わせ部における従来の圧着部の流動を示す拡大図。The enlarged view which shows the flow of the conventional crimping | compression-bonding part in a mating part. 本発明の合わせ部における圧着部の流動を示す拡大図で、図25(a)は圧着前、図25(b)は圧着後の状態を示す図。It is an enlarged view which shows the flow of the crimping | compression-bonding part in the mating part of this invention, FIG.25 (a) is a figure before crimping, FIG.25 (b) is a figure which shows the state after crimping. 端子付き電線の他の実施形態を示す分解斜視図。The disassembled perspective view which shows other embodiment of the electric wire with a terminal. 圧着端子10eの断面図。Sectional drawing of the crimp terminal 10e. 本発明の合わせ部における圧着部の流動を示す拡大図で、図28(a)は圧着前、図28(b)は圧着後の状態を示す図。It is an enlarged view which shows the flow of the crimping | compression-bonding part in the mating part of this invention, (a) is a figure before crimping | compression-bonding, and (b) shows the state after crimping | compression-bonding. 図29(a)〜図29(d)はさらに他の実施形態を示す図。Fig.29 (a)-FIG.29 (d) are figures which show other embodiment.

次に、図面を参照して本発明の実施の形態を説明する。図1(a)は、端子付き電線(ワイヤハーネス)の構成を示す分解斜視図であり、図1(b)は、圧着後の端子付き電線(ワイヤハーネス)の外観斜視図である。図2は、圧着端子の断面斜視図及び側面断面図である。   Next, embodiments of the present invention will be described with reference to the drawings. Fig.1 (a) is an exploded perspective view which shows the structure of the electric wire with a terminal (wire harness), and FIG.1 (b) is an external appearance perspective view of the electric wire with a terminal (wire harness) after crimping | compression-bonding. FIG. 2 is a sectional perspective view and a side sectional view of the crimp terminal.

図1に示すように、端子付き電線1は、圧着端子10と被覆電線50とから構成されている。   As shown in FIG. 1, the electric wire with terminal 1 includes a crimp terminal 10 and a covered electric wire 50.

被覆電線50は、導体部51と被覆部52から構成されている。導体部51は、複数のアルミニウム素線を束ねたものである。なお、導体部51は導体であればアルミニウム以外の素材(例えば銅)から構成されていても良い。また、アルミニウムの表面に銅がめっきなどによって被覆されたものでも良い。被覆部52は、樹脂等の絶縁性を有する素材から構成されており、導体部51の周囲を覆うように配置されている。   The covered electric wire 50 includes a conductor part 51 and a covering part 52. The conductor 51 is a bundle of a plurality of aluminum strands. Note that the conductor portion 51 may be made of a material other than aluminum (for example, copper) as long as it is a conductor. Further, the surface of aluminum may be coated with copper by plating or the like. The covering portion 52 is made of an insulating material such as resin, and is arranged so as to cover the periphery of the conductor portion 51.

圧着端子10は、表面が錫(Sn)でメッキされた黄銅等から構成されたメス端子である。なお、圧着端子10は、導体であれば銅以外の素材(例えばアルミニウム)から構成されていても良い。圧着端子10は、被覆電線50の導体部51と電気的に接続可能であるとともに、図略のオス端子(他の端子、相手の端子)とも電気的に接続可能である。なお、このオス端子には他の電線や電気機器が接続されており、これにより、電気機器に電力又は電気信号を供給することができる。   The crimp terminal 10 is a female terminal made of brass or the like whose surface is plated with tin (Sn). In addition, if the crimp terminal 10 is a conductor, you may be comprised from raw materials (for example, aluminum) other than copper. The crimp terminal 10 can be electrically connected to the conductor portion 51 of the covered electric wire 50 and can also be electrically connected to a male terminal (other terminal, counterpart terminal) (not shown). In addition, other electric wires and electric devices are connected to this male terminal, and thereby, electric power or electric signals can be supplied to the electric devices.

以下、圧着端子10について詳細に説明する。圧着端子10は、金属板に対して、打抜き、折曲げ、及び溶接等を行うことで成形される。図1(a)に示すように圧着端子10は、ボックス部(端子接続部)20と、電線接続部30と、トランジション部40と、を備えている。   Hereinafter, the crimp terminal 10 will be described in detail. The crimp terminal 10 is formed by performing punching, bending, welding, or the like on a metal plate. As shown in FIG. 1A, the crimp terminal 10 includes a box part (terminal connection part) 20, an electric wire connection part 30, and a transition part 40.

ボックス部20は、金属板を折り曲げて中空の直方体状とした部分である。図2に示すように、ボックス部20には、当該ボックス部20の一面である底面部22を内側に向けて折り曲げることにより、弾性接触片21が形成されている。   The box part 20 is a part formed by bending a metal plate into a hollow rectangular parallelepiped shape. As shown in FIG. 2, an elastic contact piece 21 is formed in the box portion 20 by bending a bottom surface portion 22 that is one surface of the box portion 20 inward.

弾性接触片21は、ボックス部20の先端側に形成されている。弾性接触片21は、底面部22から離れる方向及び近づく方向に弾性変形可能に構成されている。図略のオス端子をボックス部20に挿入することで、オス端子に押された弾性接触片21が底面部22に近づくように変形する。そして、オス端子が奥まで挿入されると弾性接触片21の変形が戻る。これにより、ボックス部20とオス端子とが電気的及び機械的に接続される。   The elastic contact piece 21 is formed on the distal end side of the box portion 20. The elastic contact piece 21 is configured to be elastically deformable in a direction away from and approaching the bottom surface portion 22. By inserting a male terminal (not shown) into the box portion 20, the elastic contact piece 21 pushed by the male terminal is deformed so as to approach the bottom surface portion 22. And if a male terminal is inserted to the back, a deformation | transformation of the elastic contact piece 21 will return. Thereby, the box part 20 and the male terminal are electrically and mechanically connected.

電線接続部30は、トランジション部40を介してボックス部20と接続された部分である。電線接続部30は、円筒状(中空状)であり、被覆電線50の挿入方向における一端は開放部31として開放されているとともに、その他端(ボックス部20側の端部)は封止部32として封止されている。   The wire connection part 30 is a part connected to the box part 20 via the transition part 40. The electric wire connecting portion 30 is cylindrical (hollow), and one end in the insertion direction of the covered electric wire 50 is opened as an open portion 31 and the other end (end portion on the box portion 20 side) is a sealing portion 32. It is sealed as.

電線接続部30を成形するためには、初めに、金属板を円形に折り曲げ、端部同士をファイバーレーザ等により溶接して(図1(a)の溶接箇所A)円筒状の部分を成形する。その後、この円筒状の部分の一端(ボックス部20側の端部)を塞ぐように金属板を変形させて溶接することで(図1(a)の溶接箇所B)、封止部32を形成する。ここで、溶接箇所Aは、被覆電線50の挿入方向(円筒状の部分の軸方向)と平行に形成されていると表現することができる。また、溶接箇所Bは、被覆電線の挿入方向に垂直に形成されていると表現することができる。   In order to form the electric wire connecting portion 30, first, the metal plate is bent into a circular shape, and the ends are welded with a fiber laser or the like (welded spot A in FIG. 1A) to form a cylindrical portion. . Thereafter, the sealing portion 32 is formed by deforming and welding the metal plate so as to close one end (the end portion on the box portion 20 side) of the cylindrical portion (welded portion B in FIG. 1A). To do. Here, it can be expressed that the welding location A is formed in parallel with the insertion direction of the covered electric wire 50 (the axial direction of the cylindrical portion). Moreover, the welding location B can be expressed as being formed perpendicular to the insertion direction of the covered electric wire.

なお、電線接続部30の成形方法は上記に限られず、例えば初めに金属板を折り曲げて円筒状の部分を作成しつつ(この段階では溶接を行わない)、更に一端を潰し、その後に溶接を行っても良い。この場合、工数を減らすことができるのでコストを低減させることができる。また、溶接方法も任意であり、例えば、金属板の端面同士を接触させた状態で溶接を行っても良いし、金属板の端部を重ね合わせた状態で溶接を行っても良い。更には、溶接箇所は上面側(図1(a)の上側)でなくても良く、底面側(図1(a)の下側)であっても良い。   The method for forming the wire connection portion 30 is not limited to the above. For example, the metal plate is first bent to create a cylindrical portion (no welding is performed at this stage), one end is crushed, and then welding is performed. You can go. In this case, since the number of man-hours can be reduced, the cost can be reduced. Moreover, the welding method is also arbitrary. For example, welding may be performed in a state where the end faces of the metal plates are in contact with each other, or welding may be performed in a state where the end portions of the metal plates are overlapped. Furthermore, the welding location may not be on the upper surface side (upper side in FIG. 1A), but may be on the bottom surface side (lower side in FIG. 1A).

以上の処理を行うことにより、電線接続部30が完成する。上記のように溶接箇所Aに溶接を行うことで、電線接続部30の表面からの浸水を防止できる。また、上記のように溶接箇所Bに溶接を行って封止部32を形成することで、電線接続部30とボックス部20との間からの浸水を防止することができる。なお、開放部31からの浸水(被覆電線50を伝う経路からの浸水)を防止する方法については後述する。   The electric wire connection part 30 is completed by performing the above process. By performing welding on the welding location A as described above, water from the surface of the wire connection portion 30 can be prevented. Moreover, the welding part B is welded as described above to form the sealing portion 32, thereby preventing water from entering between the wire connection portion 30 and the box portion 20. In addition, the method of preventing the flooding from the open part 31 (the flooding from the path | route which passes along the covered electric wire 50) is mentioned later.

また、電線接続部30の内側の壁面である内壁面33には、第1の溝(または凹部)または突起で構成される導通用押圧部33bと、第1の溝または突起とは異なる第2の溝(または凹部)または突起で構成される防水用圧縮部33aとが形成されている。防水用圧縮部33aは、圧着端子10の内部への浸水を防止しつつ被覆電線50を固定する。導通用押圧部33bは、被覆電線50の導体部51が酸化膜に覆われていた場合であっても良好に導通を行うことができる。   In addition, the inner wall surface 33 which is the inner wall surface of the electric wire connecting portion 30 has a conduction pressing portion 33b formed of a first groove (or a recess) or a protrusion and a second different from the first groove or the protrusion. And a waterproof compression portion 33a formed of a groove (or a recess) or a protrusion. The waterproof compression portion 33 a fixes the covered electric wire 50 while preventing water from entering the crimp terminal 10. Even if it is a case where the conductor part 51 of the covered electric wire 50 is covered with the oxide film, the press part 33b for conduction | electrical_connection can perform favorable conduction | electrical_connection.

以下、防水用圧縮部33aと導通用押圧部33bについて図2から図4を参照して説明する。図3は、圧着端子10の内壁面33の形状を示す展開図及び側面断面図である。図4は、圧着端子10と被覆電線50とを接続する工程を示す側面断面図である。なお、図3(b)は、図3(a)を鎖線で切ったときの断面を示す図である。また、側面断面図において、電線接続部30の断面よりも紙面奥側の形状(溝等)は、視認性を良くするために描画を省略することがある。   Hereinafter, the waterproof compression part 33a and the conduction pressing part 33b will be described with reference to FIGS. FIG. 3 is a developed view and a side sectional view showing the shape of the inner wall surface 33 of the crimp terminal 10. FIG. 4 is a side sectional view showing a process of connecting the crimp terminal 10 and the covered electric wire 50. In addition, FIG.3 (b) is a figure which shows a cross section when Fig.3 (a) is cut with a dashed line. Moreover, in the side cross-sectional view, the shape (groove or the like) on the back side of the paper surface relative to the cross section of the wire connection portion 30 may be omitted from drawing in order to improve visibility.

防水用圧縮部33aは、図2及び図3に示すように、内壁面33の全周にわたって形成された突起(凸部)から構成されている。なお、「全周」とは、間断無く形成されるだけでなく、例えば溶接箇所を除いて形成された場合等も含むものとする。また、本実施形態では防水用圧縮部33aは2本の突起から構成されているが、防水用圧縮部33aの形状は任意であり、適宜変更することができる(詳細は後述)。   As shown in FIGS. 2 and 3, the waterproof compression part 33 a is configured by a protrusion (convex part) formed over the entire circumference of the inner wall surface 33. The “entire circumference” is not only formed without interruption, but also includes, for example, a case where the entire circumference is formed excluding a welded portion. In this embodiment, the waterproof compression part 33a is composed of two protrusions, but the shape of the waterproof compression part 33a is arbitrary and can be changed as appropriate (details will be described later).

なお、防水用圧縮部33aを構成する突起は、2か所(2列)以上設けることが望ましい。2か所以上形成することで、2か所の突起間に被覆部の樹脂が嵌りこみ、引張強度を高めることができる。   In addition, it is desirable to provide two or more (two rows) of protrusions constituting the waterproof compression portion 33a. By forming two or more locations, the resin of the covering portion fits between the projections at two locations, and the tensile strength can be increased.

導通用押圧部33bは、図2及び図3に示すように、内壁面33に形成された複数の溝(凹部)から構成されている。なお、本実施形態では導通用押圧部33bは並べて配置された複数の長方形状の溝から構成されているが、導通用押圧部33bの形状は任意であり、適宜変更することができる(詳細は後述)。   As shown in FIGS. 2 and 3, the conduction pressing portion 33 b includes a plurality of grooves (concave portions) formed in the inner wall surface 33. In this embodiment, the conduction pressing portion 33b is composed of a plurality of rectangular grooves arranged side by side. However, the shape of the conduction pressing portion 33b is arbitrary and can be changed as appropriate (for details, see FIG. Later).

なお、図3(a)に示すように、導通用押圧部33bが設けられるエリア(長手方向の長さであって図中C)は、防水用圧縮部33aが設けられるエリア(長手方向の長さであって図中D)よりも広い。すなわち、導通用押圧部33bにおいて内壁面33に形成された複数の溝(凹部)の長手方向の端部から端部までの長さが、防水用圧縮部33aにおいて形成された複数の突起の長手方向の端部から端部までの長さよりも長い。   In addition, as shown to Fig.3 (a), the area (length in the longitudinal direction and C in the figure) in which the conduction pressing portion 33b is provided is the area (length in the longitudinal direction) in which the waterproof compression portion 33a is provided. It is wider than D) in the figure. That is, the length from the end in the longitudinal direction of the plurality of grooves (concave portions) formed in the inner wall surface 33 in the conduction pressing portion 33b is the length of the plurality of protrusions formed in the waterproof compression portion 33a. It is longer than the length from the end of the direction to the end.

このように、導通用押圧部33bの範囲が広いと、導体部51を広い範囲で描締めることができ、導体部51との接続部の引張強度と電気特性を高めることができる。一方、防水用圧縮部33aは、狭い範囲に突起を複数形成することで、被覆部52の樹脂を急激に変形させることができる。このため、被覆部52との接続部の止水性と引張強度を高めることができる。   Thus, when the range of the conduction pressing portion 33b is wide, the conductor portion 51 can be drawn in a wide range, and the tensile strength and electrical characteristics of the connection portion with the conductor portion 51 can be enhanced. On the other hand, the waterproof compression portion 33a can rapidly deform the resin of the covering portion 52 by forming a plurality of protrusions in a narrow range. For this reason, the water stop and tensile strength of a connection part with the coating | coated part 52 can be raised.

被覆電線50と圧着端子10を固定する場合、図4(a)に示すように、被覆電線50を電線接続部30の内部に挿入し、第1圧着型61と第2圧着型62とから構成される圧着工具によって挟み込むようにしてカシメる。   When fixing the covered electric wire 50 and the crimp terminal 10, as shown in FIG. 4A, the covered electric wire 50 is inserted into the electric wire connecting portion 30, and is composed of a first crimping die 61 and a second crimping die 62. The crimping tool is used for crimping.

これにより、図4(b)に示すように、防水用圧縮部33aを構成する突起が被覆部52を圧縮して当該被覆部52に食い込む。これにより、被覆電線50を伝って圧着端子10の内部に水が浸入することを防止できる。本実施形態では、内壁面33の全周にわたって突起が形成されているので、効果的に防水を行うことができる。   Thereby, as shown in FIG. 4B, the protrusions constituting the waterproof compression portion 33 a compress the cover portion 52 and bite into the cover portion 52. Thereby, water can be prevented from entering the inside of the crimp terminal 10 through the covered electric wire 50. In this embodiment, since the protrusion is formed over the entire circumference of the inner wall surface 33, waterproofing can be performed effectively.

また、本実施形態では、導体部51をアルミニウムまたはアルミニウム合金で構成し、圧着端子10を銅で構成している。このように電線接続部30と導体部51とで異なる金属を用いる場合、電食を発生させないためにも、高い防水性能が要求される。この点、本実施形態の圧着端子10は、上述のように溶接により圧着端子10の表面からの浸水を防止するとともに、防水用圧縮部33aによって、電線を伝う経路からの浸水を防止している。このように防水を行う本実施形態の構成は、電線接続部30とボックス部20との隙間をモールド樹脂等により塞ぐ構成と比較して、大幅にコストを低減することができる。   Moreover, in this embodiment, the conductor part 51 is comprised with aluminum or aluminum alloy, and the crimp terminal 10 is comprised with copper. As described above, when different metals are used for the electric wire connection portion 30 and the conductor portion 51, high waterproof performance is required in order not to cause electrolytic corrosion. In this regard, the crimp terminal 10 of the present embodiment prevents water from entering from the surface of the crimp terminal 10 by welding as described above, and prevents water from entering the path along the wire by the waterproof compression portion 33a. . Thus, the structure of this embodiment which waterproofs can reduce cost significantly compared with the structure which block | closes the clearance gap between the electric wire connection part 30 and the box part 20 with a mold resin etc. FIG.

更に、上記のように防水用圧縮部33aを圧縮させることで、被覆電線50が抜ける方向に力が掛かった場合であっても、被覆電線50が圧着端子10から抜けることを防止できる。   Furthermore, by compressing the waterproof compression portion 33a as described above, even if a force is applied in the direction in which the covered electric wire 50 is pulled out, the covered electric wire 50 can be prevented from being pulled out from the crimp terminal 10.

また、上記のように圧着を行うことで、導通用押圧部33bが導体部51を強く押圧する。このとき、導通用押圧部33bを構成する溝の縁は、面ではなく線に近い形で導体部51を押圧する。従って、導体部51の表面に酸化膜が形成されていた場合であっても、当該酸化膜の内部のアルミニウム部分まで導通用押圧部33bを到達させることができる。   Further, by performing the pressure bonding as described above, the conduction pressing portion 33 b strongly presses the conductor portion 51. At this time, the edge of the groove constituting the conduction pressing portion 33b presses the conductor portion 51 in a form close to a line, not a surface. Therefore, even if the oxide film is formed on the surface of the conductor portion 51, the conduction pressing portion 33b can reach the aluminum portion inside the oxide film.

また、本実施形態では、電線を伝う経路の防水と、導通を良好にする処理と、を圧着と同時に行うことができるので、端子付き電線1の製造を効率的に行うことができる。   Moreover, in this embodiment, since the waterproofing of the path | route which transmits an electric wire and the process which makes conduction | electrical_connection favorable can be performed simultaneously with crimping | bonding, manufacture of the electric wire 1 with a terminal can be performed efficiently.

(他の実施形態1)
次に、防水用圧縮部33aと導通用押圧部33bの他の形状について説明する。図5及び図6は、圧着端子10の内壁面33の他の形状を示す展開図及び側面断面図である。図7は、圧着端子10の内壁面33の他の形状を示す側面断面図である。
(Other embodiment 1)
Next, other shapes of the waterproof compression portion 33a and the conduction pressing portion 33b will be described. FIGS. 5 and 6 are a developed view and a side sectional view showing another shape of the inner wall surface 33 of the crimp terminal 10. FIG. 7 is a side sectional view showing another shape of the inner wall surface 33 of the crimp terminal 10.

初めに、防水用圧縮部33aの他の形状について説明する。図3の防水用圧縮部33aは内壁面33側に突起が形成されているが、それに代えて、図5に示すように内壁面33側に溝を形成しても良い。この場合、被覆部52は、防水用圧縮部33aの溝の縁によって圧縮され、溝の内部に被覆部52が入り込むようにして固定される。   First, another shape of the waterproof compression portion 33a will be described. 3 has a protrusion formed on the inner wall surface 33 side, a groove may be formed on the inner wall surface 33 side as shown in FIG. In this case, the covering portion 52 is compressed by the edge of the groove of the waterproof compression portion 33a, and is fixed so that the covering portion 52 enters the inside of the groove.

なお、防水用圧縮部33aを構成する溝又は突起の形状は任意であり、図3(b)に示すように弧状であっても良いし、図5(b)に示すように矩形状であっても良い。更には、図6(b)に示すように、台形状の突起を形成しても良い。また、防水用圧縮部33aを構成する溝又は突起の個数も任意であり、2つに限られず、1つ又は3つ以上とすることができる。   The shape of the grooves or protrusions constituting the waterproof compression portion 33a is arbitrary, and may be an arc shape as shown in FIG. 3 (b) or a rectangular shape as shown in FIG. 5 (b). May be. Furthermore, as shown in FIG. 6B, trapezoidal protrusions may be formed. Further, the number of grooves or protrusions constituting the waterproof compression portion 33a is arbitrary, and is not limited to two, and can be one or three or more.

防水用圧縮部33aの形状は、上記の他にも、図7(a)に示すように、電線接続部30の内側に近づくに連れて幅が細くなる先細状の突起を採用することができる。この形状を採用した場合、防水用圧縮部33aを容易に被覆部52に食い込ませることができる。また、この防水用圧縮部33aは、先端がボックス部20側を向いているため、被覆電線50を引抜く方向に力が掛かった場合であっても、被覆電線50が抜けることをより確実に防止できる。   In addition to the above, the waterproof compression portion 33a can employ a tapered protrusion that becomes narrower as it approaches the inner side of the wire connection portion 30, as shown in FIG. . When this shape is adopted, the waterproof compression portion 33a can be easily bited into the covering portion 52. Moreover, since the tip of the waterproof compression portion 33a faces the box portion 20 side, even when a force is applied in the direction in which the covered electric wire 50 is pulled out, the covered electric wire 50 is more reliably removed. Can be prevented.

防水用圧縮部33aの形状は、溝又は突起に限られず、図7(b)に示すように、傾斜状であっても良い。この形状であっても、径が細くなる部分において被覆部52を圧縮することができるので、防水性を発揮させることができる。   The shape of the waterproof compression portion 33a is not limited to the groove or the protrusion, and may be an inclined shape as shown in FIG. Even if it is this shape, since the coating | coated part 52 can be compressed in the part where a diameter becomes thin, waterproofness can be exhibited.

次に、導通用押圧部33bの他の形状について説明する。図3の導通用押圧部33bは内壁面33側に溝が形成されているが、それに代えて、図5に示すように内壁面33側に突起を設けても良い。この場合、突起の角部等によって導体部51が押圧される。   Next, another shape of the conduction pressing portion 33b will be described. 3 has a groove formed on the inner wall surface 33 side, it may instead be provided with a protrusion on the inner wall surface 33 side as shown in FIG. In this case, the conductor 51 is pressed by the corners of the protrusions.

なお、導通用押圧部33bを構成する溝又は突起の形状及び配置は任意であり、図3(a)に示すように長方形状の溝であっても良いし、図6(a)に示すように平行四辺形状の溝であっても良い。更には、多角形状(三角形状又は五角形状等)や円状の溝であっても良い。もちろん、細長状(リブ状)の溝であっても良いが、溝の縁が多い方が導体部51の酸化膜を貫通し易いので、多角形状の溝を複数形成する方が導通を良好にすることができる。   The shape and arrangement of the grooves or protrusions constituting the conduction pressing portion 33b are arbitrary, and may be a rectangular groove as shown in FIG. 3A, or as shown in FIG. 6A. A parallelogram-shaped groove may be used. Furthermore, it may be a polygonal shape (triangular or pentagonal shape) or a circular groove. Of course, it may be an elongated (rib-shaped) groove, but the one with a larger number of groove edges is more likely to penetrate the oxide film of the conductor portion 51. Therefore, it is better to form a plurality of polygonal grooves. can do.

このように、導通用押圧部33bは導通を良好にするために溝の縁が多い方が良いのに対し、防水用圧縮部33aは防水性を良好に発揮するために全周にわたって形成されている(即ち溝の縁が少ない)方が好ましい。従って、防水用圧縮部33aと導通用押圧部33bとで最適な形状は異なる。   As described above, it is preferable that the conduction pressing portion 33b has more groove edges in order to improve the conduction, whereas the waterproof compression portion 33a is formed over the entire circumference in order to exhibit the waterproof property well. It is preferable that there are few (that is, there are few groove edges). Accordingly, the optimum shape differs between the waterproof compression portion 33a and the conduction pressing portion 33b.

次に、防水用圧縮部33a及び導通用押圧部33bの形成方法について説明する。防水用圧縮部33a及び導通用押圧部33bは、金属板から圧着端子10を作成する際に予めプレス処理や切削処理によって形成しても良い。   Next, a method of forming the waterproof compression portion 33a and the conduction pressing portion 33b will be described. The waterproof compression part 33a and the conduction pressing part 33b may be formed in advance by pressing or cutting when the crimp terminal 10 is formed from a metal plate.

また、圧着工具を用いた圧着時に同時に防水用圧縮部33a等を形成しても良い。具体的には、図8(a)に示すように、突起(又は溝)が形成された第1圧着型61及び第2圧着型62を用いる。この圧着工具により圧着を行うことで、第1圧着型61等の突起が電線接続部30を押圧して内壁面33に突起を形成するとともに、当該突起を被覆部52に食い込ませることができる。この作業を行うことにより、圧着作業を行うと同時に防水用圧縮部33a等を形成することができる。なお、図8では防水用圧縮部33aのみをこの方法で形成しているが、導通用押圧部33bを同様の方法で形成しても良い。   Moreover, you may form the compression part 33a for waterproofing etc. simultaneously with the crimping | compression-bonding using a crimping tool. Specifically, as shown in FIG. 8A, a first crimping die 61 and a second crimping die 62 in which protrusions (or grooves) are formed are used. By performing crimping with this crimping tool, the projections of the first crimping die 61 and the like press the wire connecting portion 30 to form the projections on the inner wall surface 33, and the projections can bite into the covering portion 52. By performing this operation, the waterproof compression portion 33a and the like can be formed simultaneously with the crimping operation. In FIG. 8, only the waterproof compression portion 33a is formed by this method, but the conduction pressing portion 33b may be formed by the same method.

以上に説明したように、本実施形態の圧着端子10は、ボックス部20と、電線接続部30と、を備える。ボックス部20は、他の端子に接続される。電線接続部30は、ボックス部20と連結されており、被覆電線50が接続される。また、電線接続部30は、金属板を溶接することで形成された中空部分を含んでおり、当該中空部分の内部には、導通用押圧部33bと防水用圧縮部33aとが形成されている。導通用押圧部33bは、被覆電線50の導体部51を押圧することで、被覆電線50との導通を確保する。防水用圧縮部33aは、被覆電線50の被覆部52を内側に押圧して当該被覆部52を圧縮することで、電線接続部30の内部への浸水を防止する。   As described above, the crimp terminal 10 of the present embodiment includes the box portion 20 and the wire connection portion 30. The box unit 20 is connected to other terminals. The electric wire connection part 30 is connected with the box part 20, and the covered electric wire 50 is connected thereto. Moreover, the electric wire connection part 30 contains the hollow part formed by welding a metal plate, and the press part 33b for conduction | electrical_connection and the compression part 33a for waterproofing are formed in the inside of the said hollow part. . The conduction pressing portion 33 b ensures conduction with the covered electric wire 50 by pressing the conductor portion 51 of the covered electric wire 50. The waterproof compression part 33 a prevents the water from entering the wire connection part 30 by pressing the cover part 52 of the covered electric wire 50 inward to compress the cover part 52.

これにより、導通用押圧部33bによって被覆電線50との導通を確実に確保するとともに、溶接処理と防水用圧縮部33aの作用によって圧着端子10の内部への浸水を確実に防止できる。また、このようにして浸水を防止することで、モールド樹脂等を利用する構成と比較して、コストを大幅に削減することができる。更には、被覆電線50の被覆部52を圧縮して固定するため、被覆電線50を引っ張る力が掛かった場合であっても被覆電線50が抜けてしまうことを防止できる。   Thereby, while the conduction | electrical_connection with the covered electric wire 50 is reliably ensured by the press part 33b for conduction | electrical_connection, the inside of the crimp terminal 10 can be reliably prevented by the effect | action of a welding process and the compression part 33a for waterproofing. In addition, by preventing water immersion in this way, the cost can be greatly reduced as compared with a configuration using a mold resin or the like. Furthermore, since the covering portion 52 of the covered electric wire 50 is compressed and fixed, it is possible to prevent the covered electric wire 50 from coming off even when a force for pulling the covered electric wire 50 is applied.

本実施形態の圧着端子10において、防水用圧縮部33a及び導通用押圧部33bは、溝又は突起で構成されている。   In the crimp terminal 10 of the present embodiment, the waterproof compression portion 33a and the conduction pressing portion 33b are configured by grooves or protrusions.

これにより、導体部51に酸化膜が形成されていても、溝の縁又は突起により導通用押圧部33bと導体部51とを確実に電気的に接続することができる。また、溝又は突起を被覆部52に食い込ませることにより、確実に防水を行うことができる。   Thereby, even if the oxide film is formed in the conductor part 51, the conduction | electrical_connection press part 33b and the conductor part 51 can be reliably electrically connected by the edge or protrusion of a groove | channel. Moreover, waterproofing can be reliably performed by causing the grooves or protrusions to bite into the covering portion 52.

本実施形態の圧着端子10において、防水用圧縮部33aは、中空部分の内壁の全周にわたって形成されている。   In the crimp terminal 10 of the present embodiment, the waterproof compression portion 33a is formed over the entire circumference of the inner wall of the hollow portion.

これにより、被覆電線50の被覆部52を全周にわたって圧縮することができるので、より確実に防水を行うことができる。   Thereby, since the coating | coated part 52 of the covered electric wire 50 can be compressed over the perimeter, waterproofing can be performed more reliably.

本実施形態の圧着端子10において、導通用押圧部33bは、複数の多角形状の溝又は突起により構成されている。   In the crimp terminal 10 of the present embodiment, the conduction pressing portion 33b is configured by a plurality of polygonal grooves or protrusions.

これにより、溝の縁又は突起の数を増やすことができるので、導通用押圧部33bと導体部51とを確実に電気的に接続することができる。   Thereby, since the number of the edge or protrusion of a groove | channel can be increased, the press part 33b for conduction | electrical_connection and the conductor part 51 can be electrically connected reliably.

本実施形態の圧着端子10において、電線接続部30の表面には、被覆電線50の挿入方向に平行に形成された溶接部分(溶接箇所A)が存在する。電線接続部30のうち、ボックス部20側の端部が溶接により封止されている(溶接箇所B)。   In the crimp terminal 10 of the present embodiment, a welded portion (welded spot A) formed in parallel with the insertion direction of the covered electric wire 50 exists on the surface of the wire connecting portion 30. Of the electric wire connection part 30, the end part on the box part 20 side is sealed by welding (welding point B).

これにより、電線が挿入される箇所以外を溶接により塞ぐことができるので、より確実に防水を行うことができる。また、モールド樹脂等を利用する構成と比較して、コストを大幅に削減することができる。   Thereby, since parts other than the part where an electric wire is inserted can be closed by welding, waterproofing can be performed more reliably. Further, the cost can be greatly reduced as compared with a configuration using a mold resin or the like.

このように、本発明は、導体部51との導通を確保するための凹凸と、被覆部52を圧縮する凹凸の2種類の異なる凹凸構造を有する。このため、導体部51との導通確保と被覆部52での防水性の確保を両立することができる。   As described above, the present invention has two different types of concavo-convex structures, that is, the concavo-convex structure for ensuring electrical continuity with the conductor portion 51 and the concavo-convex structure for compressing the covering portion 52. For this reason, it is possible to ensure both the conduction with the conductor portion 51 and the waterproofness at the covering portion 52.

以上に本発明の好適な実施の形態及び変形例を説明したが、上記の構成は例えば以下のように変更することができる。   The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows, for example.

防水用圧縮部33a及び導通用押圧部33bは、上述した形状及び配置に限られず、適宜変更することができる。   The waterproof compression part 33a and the conduction pressing part 33b are not limited to the shape and arrangement described above, and can be changed as appropriate.

圧着端子10は、単線同士(又は単線と電気機器)を接続する端子として利用することができる。また、圧着端子10は、複数を並べて配置して、ジョイントコネクタの一部とすることができる。   The crimp terminal 10 can be used as a terminal for connecting single wires (or a single wire and an electric device). Also, a plurality of crimp terminals 10 can be arranged side by side to be a part of the joint connector.

圧着端子10の溶接方法及び溶接箇所は任意であり、適宜変更することができる。また、圧着端子10は、一枚の金属板から形成される構成に限られない。例えば、ボックス部20と電線接続部30とを個別に成形し、適宜の接続方法(例えば溶接)により接続することもできる。   The welding method and the welding location of the crimp terminal 10 are arbitrary and can be changed as appropriate. Moreover, the crimp terminal 10 is not restricted to the structure formed from one metal plate. For example, the box part 20 and the electric wire connection part 30 are shape | molded separately, and can also be connected by a suitable connection method (for example, welding).

電線接続部30の形状は任意であり適宜変更することができる。例えば、上記の電線接続部30は、封止部32により片側が封止されているが、ボックス部20と接続される側が適切に防水されるのであれば、両方が開放されている形状であっても良い。また、電線接続部30の開放部31は、電線が挿入し易いように外側に折り曲げられていても良い。   The shape of the electric wire connection part 30 is arbitrary and can be changed as appropriate. For example, the electric wire connecting portion 30 is sealed on one side by the sealing portion 32, but if the side connected to the box portion 20 is appropriately waterproofed, both are open. May be. Moreover, the open part 31 of the electric wire connection part 30 may be bend | folded outside so that an electric wire may be inserted easily.

上記では、メス端子の圧着端子10を例に挙げて説明したが、本願の圧着端子10をオス端子に適用することもできる。   In the above, the crimp terminal 10 of the female terminal has been described as an example, but the crimp terminal 10 of the present application can also be applied to a male terminal.

端子付き電線1は、例えば自動車に設置されるワイヤハーネスへの適用が想定されているが、防水性が要求される様々な箇所のコネクタの一部として用いることができる。   Although the electric wire 1 with a terminal is assumed to be applied to, for example, a wire harness installed in an automobile, it can be used as a part of connectors at various places where waterproofness is required.

また、本発明にかかる端子付き電線を複数本束ねて使用することもできる。本発明では、このように複数本の端子付き電線(ワイヤハーネス)が束ねられた構造体を、ワイヤハーネス構造体と称する。   Further, a plurality of electric wires with terminals according to the present invention can be bundled and used. In the present invention, a structure in which a plurality of terminal-attached electric wires (wire harnesses) are bundled in this way is referred to as a wire harness structure.

(他の実施形態2)
また、圧着前の電線接続部30は、同一径で構成したが、図9に示すように、導体部51を圧着する部位(以下、導線圧着部23)と、被覆部52を圧着する部位(以下、被覆圧着部24)の径を変化させてもよい。例えば、導線圧着部23の径よりも被覆圧着部24の径が大きくなるような段差形状を有してもよい。この場合でも、導線圧着部23の内面に導通用押圧部33bを設け、被覆圧着部24の内面に防水用圧縮部33aを設ければよい。
(Other embodiment 2)
Moreover, although the electric wire connection part 30 before crimping | compression-bonding was comprised by the same diameter, as shown in FIG. Hereinafter, the diameter of the coated crimping part 24) may be changed. For example, you may have a level | step difference shape that the diameter of the covering crimping part 24 becomes larger than the diameter of the conducting wire crimping part 23. Even in this case, the conduction pressing portion 33 b may be provided on the inner surface of the conductor crimping portion 23, and the waterproof compression portion 33 a may be provided on the inner surface of the covering crimping portion 24.

(他の実施形態3)
図10は、圧着端子10aの一部を展開した状態を示す図であり、図11は、電線接続部30の部分断面図である。図10、図11に示すように、圧着端子10aの電線接続部30は、断面が円形の筒体となるように丸められ、側縁部同士を接合して一体化することにより形成される。筒状に形成された電線接続部30の解放部から、被覆電線50が挿入される。電線接続部30は、被覆圧着部24、導線圧着部23からなる。
(Other embodiment 3)
FIG. 10 is a diagram illustrating a state in which a part of the crimp terminal 10 a is expanded, and FIG. 11 is a partial cross-sectional view of the wire connecting portion 30. As shown in FIGS. 10 and 11, the wire connection portion 30 of the crimp terminal 10 a is formed by rounding so that the cross section becomes a circular cylinder, and joining and integrating the side edges. The covered electric wire 50 is inserted from the open part of the electric wire connection part 30 formed in the cylindrical shape. The electric wire connection portion 30 includes a covering crimp portion 24 and a conductive wire crimp portion 23.

導線圧着部23には、電線接続部30の軸方向に所定の間隔をおいて、線状の係止部である凹部13a、13b、13cが設けられる。導通用押圧部33bである、凹部13a、13b、13cは、電線接続部30の内面に、凹状に連続した溝である。   The lead wire crimping portion 23 is provided with concave portions 13a, 13b, and 13c that are linear locking portions at a predetermined interval in the axial direction of the wire connecting portion 30. The recesses 13 a, 13 b, and 13 c that are the conduction pressing portions 33 b are grooves that are continuous in a concave shape on the inner surface of the wire connection portion 30.

図10に示すように、主凹部である凹部13aは、電線接続部30の幅方向(筒状にした状態の周方向)の略全体にわたって形成される。なお、幅方向の両縁部は、溶接部となるため、凹部13aは、縁部のわずかに手前まで形成される。副凹部である凹部13bは、凹部13aよりも長さが短い。例えば、凹部13aの半分程度の長さとなる。このため、電線接続部30を筒状にすると、凹部13bは、筒の略下半分の半円部分に形成される。凹部13cは、凹部13bよりもさらに短い。凹部13cは、例えば、ボックス部20の下面程度の幅に形成される。   As shown in FIG. 10, the concave portion 13 a that is the main concave portion is formed over substantially the entire width direction of the electric wire connection portion 30 (circumferential direction in a cylindrical shape). In addition, since both edge parts of the width direction become a welding part, the recessed part 13a is formed to just before the edge part. The recess 13b, which is a sub-recess, is shorter than the recess 13a. For example, the length is about half that of the recess 13a. For this reason, if the electric wire connection part 30 is made into a cylinder shape, the recessed part 13b will be formed in the semicircle part of the substantially lower half of a cylinder. The recess 13c is even shorter than the recess 13b. For example, the recess 13 c is formed to have a width approximately equal to the lower surface of the box portion 20.

図11に示すように、凹部13aは、電線接続部30の軸方向(図11の左右方向であって、被覆電線50の挿入方向)に対して、導線圧着部23の略中央近傍に形成される。凹部13bは、電線接続部30の軸方向に対して、凹部13aの両側(前後)に形成される。凹部13cは、凹部13bよりも前方(ボックス部20側)に形成される。なお、凹部13a、13b、13cの本数は、図示した例には限られず、適宜設計される。   As shown in FIG. 11, the recess 13 a is formed in the vicinity of the approximate center of the conductor crimping portion 23 with respect to the axial direction of the electric wire connecting portion 30 (the horizontal direction in FIG. 11 and the insertion direction of the covered electric wire 50). The The concave portion 13 b is formed on both sides (front and rear) of the concave portion 13 a with respect to the axial direction of the wire connecting portion 30. The recess 13c is formed in front of the recess 13b (on the box portion 20 side). The number of the recesses 13a, 13b, and 13c is not limited to the illustrated example, and is appropriately designed.

図12は、ワイヤハーネスを形成する工程を示す図であり、筒状の電線接続部30に被覆電線50を挿入する状態を示す図である。前述したように、電線接続部30は、略筒状に丸められて、縁部同士が接合される。電線接続部30は、被覆電線50が挿入される部位以外は、封止される。   FIG. 12 is a diagram illustrating a process of forming the wire harness, and is a diagram illustrating a state in which the covered electric wire 50 is inserted into the tubular electric wire connecting portion 30. As described above, the wire connection portion 30 is rolled into a substantially cylindrical shape, and the edges are joined to each other. The wire connection portion 30 is sealed except for the portion where the covered wire 50 is inserted.

被覆電線50は、導体部51が絶縁性の被覆部52によって被覆される。被覆電線50を電線接続部30に挿入する際には、被覆電線50の先端の一部の被覆部52が剥離され、導体部51を露出させておく。   In the covered electric wire 50, the conductor portion 51 is covered with an insulating covering portion 52. When inserting the covered electric wire 50 into the electric wire connecting portion 30, a portion of the covering portion 52 at the tip of the covered electric wire 50 is peeled off to expose the conductor portion 51.

このようにすることで、圧着後において、被覆圧着部24と被覆部52との密着によって電線接続部30を封止することができる。この際、電線接続部30の後端部以外の他の部位は、水密に封止されるため、電線接続部30への水分の浸入を防止することができる。   By doing in this way, after the crimping | compression-bonding, the electric wire connection part 30 can be sealed by the close_contact | adherence with the covering crimping | compression-bonding part 24 and the coating | coated part 52. FIG. At this time, since the other portions other than the rear end portion of the wire connection portion 30 are sealed in a watertight manner, it is possible to prevent moisture from entering the wire connection portion 30.

まず、図12(a)に示すように、電線接続部30に被覆電線50の先端を挿入する。図12(a)は、電線接続部30を圧着する第1圧着型61、第2圧着型62を配置した状態の部分断面図である。   First, as shown in FIG. 12A, the end of the covered electric wire 50 is inserted into the electric wire connecting portion 30. FIG. 12A is a partial cross-sectional view showing a state in which the first crimping die 61 and the second crimping die 62 for crimping the electric wire connecting portion 30 are arranged.

第1圧着型61には、導線圧着部23に対応する部位に、電線接続部30の軸方向に対して断面が略ストレートであるストレート部が形成され、その前後方向にはテーパ部が形成される。すなわち、第1圧着型61は、圧着方向の略中央部が突出する逆台形状に形成される。したがって、ストレート部は、圧縮率が高く、強圧着部となる。ストレート部とテーパ部との境界には、金型角部66が形成される。第1圧着型61のストレート部に対応する部位には、凹部13aが設けられ、金型角部66に対応する部位には凹部13bが設けられる。   In the first crimping die 61, a straight portion having a substantially straight cross section with respect to the axial direction of the wire connecting portion 30 is formed at a portion corresponding to the conductor crimping portion 23, and a tapered portion is formed in the front-rear direction. The That is, the first crimping die 61 is formed in an inverted trapezoidal shape with a substantially central portion in the crimping direction protruding. Therefore, the straight part has a high compression ratio and becomes a strong pressure bonding part. A mold corner 66 is formed at the boundary between the straight portion and the tapered portion. A concave portion 13 a is provided in a portion corresponding to the straight portion of the first crimping die 61, and a concave portion 13 b is provided in a portion corresponding to the mold corner portion 66.

なお、第1圧着型61、第2圧着型62の被覆圧着部24に対応する部位には、周方向にわたって突起が形成される。突起は、例えば、2列配置される。突起は、圧着時に防水用圧縮部33aを形成する部位である。   In addition, a protrusion is formed in the circumferential direction in a portion corresponding to the cover crimping portion 24 of the first crimping die 61 and the second crimping die 62. For example, the protrusions are arranged in two rows. The protrusion is a portion that forms the waterproof compression portion 33a during pressure bonding.

図12(b)は、圧着時の第1圧着型61、第2圧着型62を示す断面図である。第1圧着型61と第2圧着型62とで電線接続部30を挟み込み、導線圧着部23と導体部51を圧着させる。   FIG. 12B is a cross-sectional view showing the first crimping die 61 and the second crimping die 62 during crimping. The electric wire connecting portion 30 is sandwiched between the first crimping die 61 and the second crimping die 62 and the conductor crimping portion 23 and the conductor portion 51 are crimped.

導体部51は、凹部13a、13b、13cに押し込まれるようにして流動する。導体部51が凹部13a、13b、13cに押し込まれることで、高い圧着力を確保することができる。また、導体部51の表面が流動することで、表面の酸化被膜が破壊され、導体部51と導線圧着部23との電気抵抗を低減することができる。このような効果は、特に、導体部51がアルミニウム系材料製であることで発揮される。   The conductor 51 flows so as to be pushed into the recesses 13a, 13b, and 13c. A high crimping force can be secured by the conductor 51 being pushed into the recesses 13a, 13b, and 13c. Moreover, since the surface of the conductor part 51 flows, the oxide film on the surface is destroyed, and the electrical resistance between the conductor part 51 and the conductor crimping part 23 can be reduced. Such an effect is exhibited particularly when the conductor 51 is made of an aluminum-based material.

第1圧着型61のストレート部で圧着された部位において、凹部13aは、導線圧着部23の略全周にわたって形成される。したがって、導体部51が凹部13aに流動し、導線圧着部23の略全周において、導体部51を保持することができる。   In the portion crimped by the straight portion of the first crimping die 61, the recess 13a is formed over substantially the entire circumference of the conductor crimping portion 23. Therefore, the conductor part 51 flows into the recessed part 13a, and the conductor part 51 can be held in substantially the entire circumference of the conductor crimping part 23.

一方、金型角部66で圧着された部位においては、凹部13bが形成される。金型角部66は、圧着時に応力が集中する部位となる。このため、第1圧着型61によって圧着した際、金型角部66に対応する部位では、割れが生じやすい。このため、凹部13bの形成位置が金型角部66によって圧縮されると、凹部13bにより薄肉となる部位に割れが生じやすくなる。本発明では、凹部13bは、導線圧着部23の略下半周分にのみ形成され、導線圧着部23の上面には形成されない。したがって、金型角部66に対応する部位に、薄肉部が形成されず、割れの発生を抑制することができる。   On the other hand, a concave portion 13b is formed at a portion crimped by the mold corner portion 66. The mold corner portion 66 is a portion where stress is concentrated during pressure bonding. For this reason, when the first crimping die 61 is crimped, a crack is likely to occur at a portion corresponding to the mold corner 66. For this reason, if the formation position of the recessed part 13b is compressed by the metal mold | die corner | angular part 66, it will become easy to produce a crack in the site | part which becomes thin by the recessed part 13b. In the present invention, the recess 13 b is formed only in the substantially lower half circumference of the conductor crimping portion 23, and is not formed on the upper surface of the conductor crimping portion 23. Therefore, a thin part is not formed in the site | part corresponding to the metal mold | die corner part 66, and generation | occurrence | production of a crack can be suppressed.

なお、導体部51が圧着されると、導体部51は軸方向に伸ばされる。このため、電線接続部30の前端部側に流動する。凹部13cには、流動した導体部51の先端部近傍が押し込まれて、導体部51を保持する。なお、本発明では、金型角部66に対応する部位の凹部13bを他の部位よりも短くして、凹部13bが導線圧着部23の上面まで配置されなければよい。このため、凹部13cは必ずしも必要ではなく、また、凹部13cを、電線接続部30の略全周に形成してもよい。このように、凹部13a、13b、13cが導通用押圧部33bとして機能する。   When the conductor part 51 is crimped, the conductor part 51 is extended in the axial direction. For this reason, it flows to the front end portion side of the wire connecting portion 30. The vicinity of the tip of the flowing conductor part 51 is pushed into the recess 13c to hold the conductor part 51. In the present invention, the concave portion 13 b corresponding to the mold corner 66 may be made shorter than the other portions so that the concave portion 13 b is not disposed up to the upper surface of the conductor crimping portion 23. For this reason, the recessed part 13c is not necessarily required, and you may form the recessed part 13c in the substantially whole periphery of the electric wire connection part 30. FIG. In this manner, the recesses 13a, 13b, and 13c function as the conduction pressing portion 33b.

また、被覆圧着部24では、第1圧着型61、第2圧着型62に形成された突起によって、電線接続部30の内面に突出した突起(防水用圧縮部33a)が形成される。すなわち、第1圧着型61、第2圧着型62に形成された突起によって、他の部位よりも強く押圧された部位で、被覆部52を強く圧縮して、防水性を確保することができる。   Further, in the cover crimping portion 24, a projection (waterproof compression portion 33 a) that protrudes from the inner surface of the wire connection portion 30 is formed by the projections formed on the first crimping die 61 and the second crimping die 62. That is, it is possible to ensure waterproofness by strongly compressing the covering portion 52 at a portion pressed stronger than the other portions by the protrusions formed on the first pressure-bonding die 61 and the second pressure-bonding die 62.

ここで、図中Eは、被覆圧着部24の長手方向の範囲を示し、図中Fは、被覆圧着部24の前端から中心までの範囲を示す。防水用圧縮部33aの突起は、被覆圧着部24の長手方向の寸法を二等分する線よりも前方(導線圧着部23側)に配置されることが望ましい。なお、複数の突起が形成される場合には、最も前方側の突起が、被覆圧着部24の長手方向の寸法を二等分する線よりも前方に配置されればよい。これは以下の理由による。   Here, E in the figure indicates a range in the longitudinal direction of the coated crimping part 24, and F in the figure indicates a range from the front end to the center of the coated crimped part 24. It is desirable that the protrusion of the waterproof compression portion 33a be disposed in front of the line that bisects the longitudinal dimension of the covering crimp portion 24 (on the side of the conductor crimp portion 23). When a plurality of protrusions are formed, the protrusion on the foremost side only needs to be disposed in front of a line that bisects the longitudinal dimension of the cover crimping portion 24. This is due to the following reason.

上記のような第1圧着型61、第2圧着型62を用いることによって、圧着端子10aは、後端部(図中右側)に向かって僅かにその径が大きく広がる傾向にある。すなわち、後端部から延出した被覆電線50の被覆部52は、圧着端子10aによって押圧されることがないから、押圧された部分よりもその径が大きくなる。被覆部52は弾性を有するため、後端部に向かって被覆部52の径が大きくなるように傾斜する傾向にある。このように被覆電線50の傾斜に対応して、圧着端子10a(被覆圧着部24)も、後端部に向かって径が大きく広がるように傾斜する。   By using the first crimping die 61 and the second crimping die 62 as described above, the crimping terminal 10a tends to have a slightly larger diameter toward the rear end (right side in the drawing). That is, since the covering portion 52 of the covered electric wire 50 extending from the rear end portion is not pressed by the crimp terminal 10a, the diameter thereof is larger than the pressed portion. Since the covering portion 52 has elasticity, it tends to be inclined so that the diameter of the covering portion 52 increases toward the rear end portion. Thus, corresponding to the inclination of the covered electric wire 50, the crimp terminal 10 a (covered crimp part 24) is also inclined so that the diameter greatly increases toward the rear end part.

このように径が大きくなる部位に突起を形成しても、突起形成による所望の圧着力を得られにくい。しかし、突起を被覆圧着部24の中心よりも前方に配置することで、突起が径の広がりの影響を受けにくい。すなわち、突起によって、被覆部52を確実に圧着することができる。   Even if the protrusion is formed at the portion where the diameter is increased in this way, it is difficult to obtain a desired pressure-bonding force by the formation of the protrusion. However, by disposing the protrusion in front of the center of the cover crimping portion 24, the protrusion is not easily affected by the increase in diameter. That is, the covering portion 52 can be reliably crimped by the protrusion.

以上説明したように、本実施の形態では、導通用押圧部33bである凹部13a、13b、13cに導体部51が押し込まれるため、導体部51を確実に保持することができる。また、導線圧着部23の、金型角部66に対応する部位には、凹部13bが設けられる。凹部13bは、電線接続部30の上面まで連続せず、下半周分程度に形成される。このため、金型角部66に押圧される部位に薄肉部が形成されることを防止することができる。このため、金型角部66によって、電線接続部30に割れが生じることを抑制することができる。   As described above, in the present embodiment, since the conductor portion 51 is pushed into the recesses 13a, 13b, and 13c, which are the conduction pressing portions 33b, the conductor portion 51 can be reliably held. Further, a concave portion 13 b is provided at a portion of the lead wire crimping portion 23 corresponding to the mold corner portion 66. The recess 13b is not continuous to the upper surface of the wire connection part 30, and is formed about the lower half circumference. For this reason, it can prevent that a thin part is formed in the site | part pressed by the metal mold | die corner | angular part 66. FIG. For this reason, it is possible to prevent the wire connecting portion 30 from being cracked by the mold corner portion 66.

また、本実施の形態では、第1圧着型61、第2圧着型62による圧着時に、防水用圧縮部33aが形成される。このため、被覆電線50を電線接続部30に挿入する際に、突起が邪魔になることがない。   In the present embodiment, the waterproof compression portion 33 a is formed when the first crimping die 61 and the second crimping die 62 are crimped. For this reason, when inserting the covered electric wire 50 in the electric wire connection part 30, a protrusion does not become obstructive.

なお、本実施形態では、突起が2列形成される例を示した。これは、前述したように、突起を2列以上形成した方が、より高い引張強度と防水性を確保できるためである。   In the present embodiment, an example in which two rows of protrusions are formed is shown. This is because, as described above, the formation of two or more rows of protrusions can ensure higher tensile strength and waterproofness.

実際に、突起の個数による止水性の評価を行った、上記のような端子付き電線1において、被覆電線50の被覆部52から圧着端子10に向かって空気を送り、後端部から空気が漏れるか否かについて実験した。図13には、実験方法の概要を示す。実験は、水を入れた水槽41中に被覆電線50を圧着した圧着端子10を入れ、被覆電線50の端部から圧着端子10に向かってレギュレータ42によって加圧空気を送った。加圧空気は、200kpaまで上昇させた。   Actually, in the electric wire with a terminal 1 as described above, the water stoppage was evaluated by the number of protrusions, air was sent from the covering portion 52 of the covered electric wire 50 toward the crimp terminal 10, and air leaked from the rear end portion. It was experimented whether or not. FIG. 13 shows an outline of the experimental method. In the experiment, the crimp terminal 10 to which the coated electric wire 50 was crimped was placed in a water tank 41 containing water, and pressurized air was sent from the end of the coated electric wire 50 toward the crimp terminal 10 by the regulator 42. The pressurized air was raised to 200 kpa.

サンプル1は、防水用圧縮部33aの突起を設けないもの、サンプル2は、防水用圧縮部33aの突起を一列周方向に形成したもの、サンプル3は、防水用圧縮部33aの突起を2列周方向に形成したものである。なお、表中の200kPaは、200kPaでも漏れが確認されなかったことを示す。   Sample 1 is provided with no protrusions of waterproof compression part 33a, Sample 2 is formed of protrusions of waterproof compression part 33a in the circumferential direction, Sample 3 is provided with two lines of protrusions of waterproof compression part 33a It is formed in the circumferential direction. In addition, 200 kPa in a table | surface shows that the leak was not confirmed even at 200 kPa.

結果より、突起を有さないサンプル1では、n=5の一つにおいて、90kPaで漏れが見られた。すなわち、最低漏れ圧力は90kPaであった。これに対し、サンプル2は、n=5の一つにおいて漏れが確認され、最低漏れ圧力が140kPaであったが、サンプル1よりも良好な結果となった。また、突起が2列設けられるサンプル3では、n=5の全てが200kPaでも漏れが見られなかった。このように、突起を設けることで、水密性を高めることができ、1列よりも2列形成した方が、その効果が大きいことが分かった。   As a result, in sample 1 having no protrusion, leakage was observed at 90 kPa in one of n = 5. That is, the minimum leakage pressure was 90 kPa. On the other hand, in sample 2, leakage was confirmed at one of n = 5, and the minimum leakage pressure was 140 kPa, but the result was better than that of sample 1. Further, in sample 3 in which two rows of protrusions were provided, no leakage was observed even when all of n = 5 were 200 kPa. Thus, by providing protrusions, watertightness can be improved, and it has been found that the effect is greater when two rows are formed than one row.

(他の実施形態4)
図14は、端子付き電線1aを示す断面図である。なお、本実施形態では、導通用押圧部33bの図示を省略する。電線接続部30には、被覆電線50が挿入される。前述したとおり、導線圧着部23には導体部51が位置し、被覆圧着部24には被覆部52が位置する。
(Other embodiment 4)
FIG. 14 is a cross-sectional view showing the terminal-attached electric wire 1a. In the present embodiment, illustration of the conduction pressing portion 33b is omitted. A covered electric wire 50 is inserted into the electric wire connecting portion 30. As described above, the conductor portion 51 is located in the conductor crimping portion 23, and the covering portion 52 is located in the covering crimping portion 24.

電線接続部30に被覆電線50を挿入した状態で、前述した金型によって電線接続部30が加締められる。これにより、導線圧着部23と導体部51とが圧着され、被覆圧着部24と被覆部52とが圧着される。   In a state where the covered electric wire 50 is inserted into the electric wire connecting portion 30, the electric wire connecting portion 30 is crimped by the above-described mold. Thereby, the lead wire crimping part 23 and the conductor part 51 are crimped, and the covering crimping part 24 and the covering part 52 are crimped.

被覆圧着部24には、防水用圧縮部33aの突起が設けられる。また、導線圧着部23は被覆圧着部24よりも圧縮量が大きく、強く圧着されるため、導線圧着部23と被覆圧着部24との間に徐々に圧縮量が変化するテーパ部が形成される。すなわち、テーパ部は、導体部51と被覆部52との境界部近傍に形成される。このようなテーパ部は、例えば第1圧着型61のテーパ形状によって形成される。   The covering crimping portion 24 is provided with a protrusion of the waterproof compression portion 33a. In addition, since the lead wire crimping portion 23 has a larger compression amount than that of the cover crimping portion 24 and is strongly crimped, a taper portion in which the compression amount gradually changes is formed between the lead wire crimping portion 23 and the sheath crimping portion 24. . That is, the taper portion is formed in the vicinity of the boundary portion between the conductor portion 51 and the covering portion 52. Such a taper part is formed by the taper shape of the 1st crimping | compression-bonding type | mold 61, for example.

テーパ部には、内面に突出する凸部25が設けられる。凸部25は、テーパ部のどこに位置されてもよい。すなわち、圧着後にテーパ部に対応するいずれかの位置に凸部25が設けられる。なお、テーパ部は、端子の上面にのみ形成される例を示したが、全周にわたってテーパ部が形成されてもよい。また、凸部25は、圧着時に金型によって形成してもよく、予め端子の状態で形成しておいてもよい。   The taper part is provided with a convex part 25 protruding from the inner surface. The convex portion 25 may be located anywhere on the tapered portion. That is, the convex part 25 is provided in any position corresponding to a taper part after crimping | compression-bonding. In addition, although the example in which the tapered portion is formed only on the upper surface of the terminal is shown, the tapered portion may be formed over the entire circumference. Moreover, the convex part 25 may be formed with a metal mold | die at the time of pressure bonding, and may be previously formed in the state of the terminal.

ここで、導体部51と被覆部52とは、圧着前の状態で外径が異なる。このため、導体部51と被覆部52との境界には、外径が変化する外径段差部が形成される。凸部25は、導体部51と被覆部52との間に形成される外径段差部に対応する位置に設けられることが望ましい。   Here, the conductor part 51 and the covering part 52 have different outer diameters before being crimped. For this reason, an outer diameter step portion whose outer diameter changes is formed at the boundary between the conductor portion 51 and the covering portion 52. The convex portion 25 is desirably provided at a position corresponding to an outer diameter step portion formed between the conductor portion 51 and the covering portion 52.

図15は、導体部51と被覆部52との間に形成されるテーパ部近傍の拡大図である。図15(a)に示すように、テーパ部近傍に凸部25のような形状を有さないと、テーパ形状に応じたエア溜り27が形成される。これは、導線圧着部23と被覆圧着部24とは圧縮量が異なり、その境界にテーパ部が形成されるが、内部の導体部51と被覆部52は、このテーパ形状に完全に追従できないためである。   FIG. 15 is an enlarged view of the vicinity of the tapered portion formed between the conductor portion 51 and the covering portion 52. As shown in FIG. 15A, if there is no shape like the convex portion 25 in the vicinity of the tapered portion, an air reservoir 27 corresponding to the tapered shape is formed. This is because the lead wire crimping part 23 and the covering crimping part 24 have different compression amounts, and a tapered part is formed at the boundary between them, but the inner conductor part 51 and the covering part 52 cannot completely follow this tapered shape. It is.

このようなエア溜りが生じると、使用時において、エアが熱膨張する恐れがある。この場合、エアが被覆部52と被覆圧着部24との隙間から外部に逃げる。この際、エアの流路から、水分が浸入する恐れがある。したがって、このようなエア溜りはできるだけ小さくすることが望ましい。   If such an air pool occurs, the air may thermally expand during use. In this case, air escapes from the gap between the covering portion 52 and the covering pressure bonding portion 24 to the outside. At this time, moisture may enter from the air flow path. Therefore, it is desirable to make such an air reservoir as small as possible.

これに対し、図15(b)に示すように、テーパ部に凸部25を設けることで、テーパ部や外径段差部によって形成されるエア溜り27を小さくすることができる。すなわち、凸部25がエア溜り27に突出し、この空間が縮小される。このため、エア漏れやエア漏れに伴う水の浸入を抑制することができる。   On the other hand, as shown in FIG. 15B, the air reservoir 27 formed by the tapered portion or the outer diameter step portion can be reduced by providing the convex portion 25 at the tapered portion. That is, the convex part 25 protrudes into the air reservoir 27, and this space is reduced. For this reason, infiltration of water accompanying air leakage and air leakage can be suppressed.

(他の実施形態5)
図16は、圧着端子10bの電線接続部30を展開した図である。なお、本実施形態では、防水用圧縮部33aの図示を省略する。電線接続部30の内面には、幅方向に離間して設けられる複数条の導通用押圧部33b(溝)が設けられる。幅方向に離間して設けられる導通用押圧部33bの間は凹凸のない平坦部となる。ここで、幅方向に離間して設けられる導通用押圧部33b同士の間に、長手方向へ延びる仮想線35を想定する。すなわち、仮想線35上には、導通用押圧部33b(溝)が設けられない。
(Other embodiment 5)
FIG. 16 is a developed view of the wire connecting portion 30 of the crimp terminal 10b. In the present embodiment, illustration of the waterproof compression portion 33a is omitted. A plurality of conductive pressing portions 33b (grooves) provided to be separated from each other in the width direction are provided on the inner surface of the wire connection portion 30. Between the pressing portions 33b for conduction provided apart from each other in the width direction is a flat portion without unevenness. Here, an imaginary line 35 extending in the longitudinal direction is assumed between the conduction pressing portions 33b provided separately in the width direction. That is, the conduction pressing portion 33 b (groove) is not provided on the virtual line 35.

図17は、金型で導線圧着部23を圧着加工するときの説明図であり、図17(a)は圧着前、図17(b)は圧着後を示す。導線圧着部23を圧着加工するための金型は、第1圧着型61と第2圧着型62からなる。第1圧着型61は、上面略中央に、下方に突出する凸部と、凸部の幅方向両側に位置する肩部26とを有する。   FIGS. 17A and 17B are explanatory diagrams when the lead wire crimping portion 23 is crimped with a mold, in which FIG. 17A shows before crimping and FIG. 17B shows after crimping. A mold for crimping the conductor crimping portion 23 includes a first crimping die 61 and a second crimping die 62. The first crimping die 61 has a convex portion that protrudes downward and a shoulder portion 26 that is located on both sides in the width direction of the convex portion at substantially the center of the upper surface.

第2圧着型62は、第1圧着型61が噛み合う凹部を有する。第1圧着型61と第2圧着型62を対向させるとともに、これらの間に導体部51が挿入された導線圧着部23が配置される。第1圧着型61と第2圧着型62とを押圧することによって、導体部51と導線圧着部23とを圧着することができる。   The second crimping die 62 has a recess with which the first crimping die 61 is engaged. The first crimping die 61 and the second crimping die 62 are opposed to each other, and the conductor crimping portion 23 in which the conductor portion 51 is inserted is disposed therebetween. By pressing the first crimping die 61 and the second crimping die 62, the conductor 51 and the conductor crimping portion 23 can be crimped.

本実施形態では、肩部26に対応する部位に、前述した仮想線35が位置するように設計される。すなわち、仮想線35近傍は平坦部であり、導通用押圧部33b(溝)が形成されない部位である。したがって、肩部26で圧縮される部位の近傍は、導通用押圧部33b(溝)が形成されない部位となる。   In the present embodiment, the above-described virtual line 35 is designed to be located at a portion corresponding to the shoulder portion 26. That is, the vicinity of the imaginary line 35 is a flat portion, which is a portion where the conduction pressing portion 33b (groove) is not formed. Accordingly, the vicinity of the portion compressed by the shoulder portion 26 is a portion where the conduction pressing portion 33b (groove) is not formed.

ここで、導線圧着部23において、両側の肩部26近傍は、変形量が大きい。このため、肩部26は他の部分に比べて肉薄になりやすい。肉薄になったところにさらに導通用押圧部33b(溝)を形成すれば、亀裂の発生を誘発しかねない。しかし、肩部26に対応する部位は溝が形成されない平坦部となるため、たとえ肩部26が肉薄になったとしても亀裂が生じることを抑制することができる。   Here, in the conductor crimping portion 23, the deformation amount is large in the vicinity of the shoulder portions 26 on both sides. For this reason, the shoulder part 26 tends to be thinner than other parts. If the conduction pressing portion 33b (groove) is further formed in the thinned portion, cracking may be induced. However, since the portion corresponding to the shoulder portion 26 is a flat portion where no groove is formed, even if the shoulder portion 26 becomes thin, the occurrence of cracks can be suppressed.

この実施形態において、導通用押圧部33b(溝)は、直線的に延びる形状にしているが、曲線を有するものであってもよい。例えば、図18に示す圧着端子10cは、導通用押圧部33b(溝)の他の態様を示すものである。図示したように、導通用押圧部33b(溝)は、多数のドット状の溝が間隔を置いて幅方向へ並び、全体として線条の溝に見えるようにしてもよい。また、溝の平面形状をほぼ円形としているが、矩形や平行四辺形等の他の形状にすることもできる。   In this embodiment, the conduction pressing portion 33b (groove) has a linearly extending shape, but may have a curved line. For example, the crimp terminal 10c shown in FIG. 18 shows another aspect of the conduction pressing portion 33b (groove). As shown in the drawing, the conduction pressing portion 33b (groove) may have a large number of dot-like grooves arranged in the width direction at intervals, and may appear as a linear groove as a whole. Moreover, although the planar shape of the groove is substantially circular, other shapes such as a rectangle and a parallelogram may be used.

なお、図示は省略するが、導線圧着部23の下部(例えば、図17(b)の第2圧着型62と接触する下部中央部近傍)にも、導通用押圧部33b(溝)形成しないようにしてもよい。すなわち、この部位を平坦部としてもよい。   Although illustration is omitted, the conduction pressing part 33b (groove) is not formed also in the lower part of the conductor crimping part 23 (for example, near the lower center part in contact with the second crimping die 62 in FIG. 17B). It may be. That is, this part may be a flat part.

さらに、この部位には、内面方向に突出する凸部を形成してもよい。凸部は、導線圧着部23の長手方向に連続するように形成される。   Furthermore, you may form the convex part which protrudes in an inner surface direction in this site | part. The convex portion is formed so as to be continuous in the longitudinal direction of the conductor crimping portion 23.

このように、導線圧着部23の下面側の中央付近に内周面方向に突き出す長手方向の凸条が形成された端子を用いることで、以下の理由により、確実に導体部51を圧着することができる。すなわち、導線圧着部23を下面側が凸であるU字型形状に変形させて導体部51を圧着させる際に、凸条付近が高圧着部となり、導体部51の流動性が確保される。このため、導線圧着部23の断面の中央部から側部に向かって導体部51を確実に流動させることができる。   Thus, by using the terminal in which the longitudinal ridge protruding in the inner peripheral surface direction is formed in the vicinity of the center on the lower surface side of the conductor crimping portion 23, the conductor portion 51 can be reliably crimped for the following reason. Can do. That is, when the conductor crimping portion 23 is deformed into a U-shape having a convex bottom surface and the conductor portion 51 is crimped, the vicinity of the ridge becomes a high crimp portion, and the fluidity of the conductor portion 51 is ensured. For this reason, the conductor part 51 can be reliably made to flow toward the side part from the center part of the cross section of the conducting wire crimping part 23.

(他の実施形態6)
図19は端子付き電線1bの分解斜視図であって、加締め前の状態を示し、図20は圧着端子10dの縦方向断面図である。端子付き電線1bは、被覆電線50と圧着端子10dとを有する。なお、本実施形態においては、導通用押圧部33bの図示を省略する。
(Other embodiment 6)
FIG. 19 is an exploded perspective view of the electric wire with terminal 1b, showing a state before caulking, and FIG. 20 is a longitudinal sectional view of the crimp terminal 10d. The electric wire with terminal 1b includes a covered electric wire 50 and a crimp terminal 10d. In the present embodiment, the illustration of the conduction pressing portion 33b is omitted.

圧着端子10dの電線接続部30において、被覆圧着部24の外面には、凹部28が形成される。凹部28は、被覆圧着部24の周方向において環状に形成される。なお、図20に示すように、凹部28に対応する位置の、被覆圧着部24の内面側には、凹凸が形成されず、平滑となる。このようにすることで、圧着後において、被覆圧着部24の後端部側(電線挿入側)を被覆圧着部24と被覆部52との密着によって水密に封鎖することができる。   In the wire connection part 30 of the crimp terminal 10d, a recess 28 is formed on the outer surface of the coated crimp part 24. The recess 28 is formed in an annular shape in the circumferential direction of the covering crimping portion 24. In addition, as shown in FIG. 20, the unevenness | corrugation is not formed in the inner surface side of the covering crimping | compression-bonding part 24 of the position corresponding to the recessed part 28, and it becomes smooth. By doing in this way, after crimping | compression-bonding, the rear-end part side (electric wire insertion side) of the covering crimping part 24 can be sealed watertight by contact | adherence with the covering crimping part 24 and the coating | coated part 52.

図21は、導線圧着部23および被覆圧着部24を径方向内側へ加締めて圧着した端子付き電線1bを示す断面図である。電線接続部30には、被覆電線50が挿入される。この状態で、電線接続部30が加締められる。これにより、導線圧着部23と導体部51とが圧着され、被覆圧着部24と被覆部52とが圧着される。   FIG. 21 is a cross-sectional view showing the terminal-attached electric wire 1b obtained by crimping the lead crimping portion 23 and the covering crimping portion 24 inward in the radial direction. A covered electric wire 50 is inserted into the electric wire connecting portion 30. In this state, the electric wire connection part 30 is crimped. Thereby, the lead wire crimping part 23 and the conductor part 51 are crimped, and the covering crimping part 24 and the covering part 52 are crimped.

次に、端子付き電線1bの圧着方法について説明する。図22は端子付き電線1bの圧着方法を示す概略図である。図示したように、導線圧着部23および被覆圧着部24は、圧着工具によって圧着することができる。圧着工具は、第1圧着型61と第2圧着型62とによって構成される。第1圧着型61は、内面略半円状である。第1圧着型61は、大径部34bと、大径部34bよりも小さい半径を有する小径部34aとを備える。大径部34bは、被覆圧着部24に対応する。小径部34aは、導線圧着部23に対応する。すなわち、導線圧着部23は、被覆圧着部24よりも圧縮量が大きく、強く圧着される。   Next, the crimping method of the electric wire 1b with a terminal is demonstrated. FIG. 22 is a schematic view showing a method of crimping the terminal-attached electric wire 1b. As shown in the figure, the lead wire crimping part 23 and the covering crimping part 24 can be crimped by a crimping tool. The crimping tool is composed of a first crimping die 61 and a second crimping die 62. The first crimping die 61 has a substantially semicircular inner surface. The first crimping die 61 includes a large diameter portion 34b and a small diameter portion 34a having a smaller radius than the large diameter portion 34b. The large-diameter portion 34 b corresponds to the cover crimping portion 24. The small diameter portion 34 a corresponds to the conductor crimping portion 23. That is, the conducting wire crimping portion 23 has a larger compression amount than the covering crimping portion 24 and is strongly crimped.

小径部34aおよび大径部34bのいずれも、加締め前の電線接続部30の直径よりも、その径が小さい。第2圧着型62は、内面略半円状であり、導線圧着部23および被覆圧着部24に対応するいずれの部分もその半径は同じである。なお、第1圧着型61と第2圧着型62とを組み合わせることで、断面略円状に、圧縮対象を圧縮することができる。なお、圧縮部の形状は、図示した例に限られず、円形以外の形状で圧着することもできる。   Both the small diameter part 34a and the large diameter part 34b have a diameter smaller than the diameter of the wire connection part 30 before caulking. The second crimping die 62 has a substantially semicircular inner surface, and the radius corresponding to any part corresponding to the conductor crimping part 23 and the covering crimping part 24 is the same. In addition, by combining the first crimping die 61 and the second crimping die 62, the compression target can be compressed in a substantially circular cross section. The shape of the compression portion is not limited to the illustrated example, and the compression portion can be crimped in a shape other than a circle.

図23は、圧着工具の断面図である。図示したように、第1圧着型61と第2圧着型62との合わせ部において、第1圧着型61の内面と、第2圧着型62の外面との間に僅かな段差が形成される。   FIG. 23 is a cross-sectional view of the crimping tool. As illustrated, a slight step is formed between the inner surface of the first crimping die 61 and the outer surface of the second crimping die 62 at the mating portion of the first crimping die 61 and the second crimping die 62.

図24は、端子を圧着した状態を示す、上下の金型の合わせ部近傍(図23のG部)の拡大図である。端子と電線を圧着すると、この合わせ部37の段差に向かって、被覆圧着部24の押圧力が逃げるように移動し、被覆圧着部24には突起36が形成される。このように突起36が形成される際、被覆圧着部24の導体は突起方向に流動する(図中矢印H方向)。このような導体の流動によって、被覆圧着部24の内面には窪み14が形成される。窪み14が形成されると、当該部位における被覆部52の圧縮量が低下する。したがって、被覆圧着部24と被覆部52との間に水が浸入する恐れがある。   FIG. 24 is an enlarged view of the vicinity of the mating portion (G portion in FIG. 23) of the upper and lower molds, showing a state where the terminals are crimped. When the terminal and the electric wire are crimped, they move toward the step of the mating portion 37 so that the pressing force of the covering crimping portion 24 escapes, and a projection 36 is formed on the covering crimping portion 24. Thus, when the protrusion 36 is formed, the conductor of the covering crimping portion 24 flows in the protrusion direction (in the direction of arrow H in the figure). Due to such a flow of the conductor, a recess 14 is formed on the inner surface of the coated crimping portion 24. When the dent 14 is formed, the amount of compression of the covering portion 52 at the site decreases. Therefore, there is a risk that water may enter between the coated crimping part 24 and the coated part 52.

図25は、本実施形態における合わせ部近傍の凹部28の断面拡大図である。図25(a)に示すように、本発明では、凹部28が環状に形成されるため、圧縮前の状態で、金型同士の合わせ部の位置には必ず凹部28が位置することとなる。この状態で、圧着を行うと、図25(b)に示すように、凹部28の周囲の導体が凹部28の方向に流動する。すなわち、図25(b)の紙面に垂直な方向に被覆圧着部24が流動する。このため、導体が、外方に流動することを抑制することができる。なお、凹部28の断面積は、前述した突起36の量に相当させることが望ましい。   FIG. 25 is an enlarged cross-sectional view of the recess 28 in the vicinity of the mating portion in the present embodiment. As shown in FIG. 25A, in the present invention, since the recess 28 is formed in an annular shape, the recess 28 is always located at the position of the mating portion between the dies before compression. When pressure bonding is performed in this state, the conductor around the recess 28 flows in the direction of the recess 28 as shown in FIG. That is, the covering crimping portion 24 flows in a direction perpendicular to the paper surface of FIG. For this reason, it can suppress that a conductor flows outside. It is desirable that the cross-sectional area of the recess 28 corresponds to the amount of the protrusion 36 described above.

このように、本実施形態では、被覆圧着部24が外部に流動して突起を形成することが抑制されるため、被覆圧着部24の内面には、窪みなどの凹凸が形成されることが抑制される。したがって、被覆圧着部24の内面全体で略均一に被覆部52を圧縮することができる。この結果、上下の金型の合わせ部37近傍においても、被覆圧着部24と被覆部52との間の水密が悪化することがない。   Thus, in this embodiment, since the covering crimping part 24 is suppressed from flowing to the outside and forming protrusions, it is suppressed that irregularities such as depressions are formed on the inner surface of the covering crimping part 24. Is done. Therefore, the covering portion 52 can be compressed substantially uniformly over the entire inner surface of the covering crimping portion 24. As a result, the watertightness between the coated crimping part 24 and the coated part 52 does not deteriorate even in the vicinity of the mating part 37 of the upper and lower molds.

このように、本実施形態によれば、上下の金型の合わせ部37近傍において、被覆圧着部24が外方に流動して突起が形成されることを抑制し、内面を平滑に維持することができる。この結果、被覆圧着部24と被覆部52との間の水密性を確保することができる。   Thus, according to the present embodiment, in the vicinity of the mating portion 37 of the upper and lower molds, the covering crimping portion 24 is prevented from flowing outwardly to form a protrusion, and the inner surface is kept smooth. Can do. As a result, it is possible to ensure water tightness between the coated crimping part 24 and the coated part 52.

特に、凹部28が周方向に設けられるため、被覆圧着部24が長手方向に逃げやすくなる。このため、端子の伸びを抑制することができる。このように、本実施形態では、内面に凹凸を形成せず、外周面に凹部28を形成しても、防水性を高めることができる。すなわち、凹部28が、防水用圧縮部33aとして機能する。   In particular, since the concave portion 28 is provided in the circumferential direction, the cover crimping portion 24 can easily escape in the longitudinal direction. For this reason, elongation of the terminal can be suppressed. Thus, in this embodiment, waterproofness can be improved even if the concave portion 28 is formed on the outer peripheral surface without forming the concave and convex portions on the inner surface. That is, the concave portion 28 functions as the waterproof compression portion 33a.

(他の実施形態7)
図26は、他の実施形態にかかる端子付き電線の分解斜視図であり、図27は、被覆圧着部24の断面図である。本実施形態では、圧着端子10eの外周面に凹部28に代えて、凹部28aが形成される。
(Other embodiment 7)
FIG. 26 is an exploded perspective view of a terminal-attached electric wire according to another embodiment, and FIG. 27 is a cross-sectional view of the coated crimping portion 24. In the present embodiment, a recess 28a is formed on the outer peripheral surface of the crimp terminal 10e instead of the recess 28.

凹部28aは、被覆圧着部24の外周面の長手方向に沿って形成される。したがって、図27に示すように、被覆圧着部24の断面において、一部にのみ(周方向の2か所)に凹部28aが形成される。なお、凹部28aの内面側(被覆圧着部24の内面)には、凹凸は形成されない。   The concave portion 28 a is formed along the longitudinal direction of the outer peripheral surface of the coated crimping portion 24. Therefore, as shown in FIG. 27, in the cross section of the coated crimping portion 24, the recesses 28a are formed only in a part (two places in the circumferential direction). In addition, the unevenness | corrugation is not formed in the inner surface side (inner surface of the covering crimping | compression-bonding part 24) of the recessed part 28a.

図28は、このような端子を圧着する状態を示す図である。まず、図28(a)に示すように、被覆圧着部24を金型にセットして、図28(b)に示すように端子の圧着を行う。この際、凹部28aは、第1圧着型61と第2圧着型62の合わせ部37に対応する位置に配置される。この状態で圧着を行うと、凹部28aが潰れるように、被覆圧着部24が流動(変形)する。すなわち、凹部28aが埋まる方向に被覆圧着部24が流動(変形)する。このため、被覆圧着部24が、外方に流動することを抑制することができる。なお、凹部28aの断面積は、前述した突起36の量に相当させることが望ましい。   FIG. 28 is a diagram showing a state in which such a terminal is crimped. First, as shown in FIG. 28 (a), the coated crimping portion 24 is set in a mold, and the terminals are crimped as shown in FIG. 28 (b). At this time, the recess 28 a is disposed at a position corresponding to the mating portion 37 of the first crimping die 61 and the second crimping die 62. When pressure bonding is performed in this state, the coated pressure bonding portion 24 flows (deforms) so that the concave portion 28a is crushed. That is, the coated crimping portion 24 flows (deforms) in the direction in which the recess 28a is filled. For this reason, it can suppress that the coating | bonding crimping | compression-bonding part 24 flows outside. It is desirable that the cross-sectional area of the recess 28a corresponds to the amount of the protrusion 36 described above.

なお、長手方向に凹部28aを設ける場合には、凹部28aは、合わせ部37の少し上(第1圧着型61の曲面部)に形成することが望ましい。   In addition, when providing the recessed part 28a in a longitudinal direction, it is desirable to form the recessed part 28a slightly above the mating part 37 (the curved surface part of the first crimping die 61).

このように、本実施形態では、被覆圧着部24が外部に流動して突起を形成することが抑制される。このため、被覆圧着部24の内面には、窪みなどの凹凸が形成されることが抑制される。したがって、被覆圧着部24の内面全体で略均一に被覆部52を圧縮することができる。この結果、上下の金型の合わせ部37近傍においても、被覆圧着部24と被覆部52との間の水密が悪化することがない。すなわち、凹部28aが、防水用圧縮部33aとして機能する。   Thus, in this embodiment, it is suppressed that the coating | bonding crimping | compression-bonding part 24 flows outside and forms a protrusion. For this reason, it is suppressed that unevenness | corrugations, such as a hollow, are formed in the inner surface of the covering crimping | compression-bonding part 24. FIG. Therefore, the covering portion 52 can be compressed substantially uniformly over the entire inner surface of the covering crimping portion 24. As a result, the watertightness between the coated crimping part 24 and the coated part 52 does not deteriorate even in the vicinity of the mating part 37 of the upper and lower molds. That is, the concave portion 28a functions as the waterproof compression portion 33a.

(他の実施形態8) (Other embodiment 8)

図29(a)に示す圧着端子10fのように、合わせ部が被覆圧着部24の下面側に位置する場合には、被覆圧着部24の下面側のみに凹部28bを形成してもよい。同様に、図29(b)に示す圧着端子10gのように、合わせ部が被覆圧着部24の上面側に位置する場合には、被覆圧着部24の上面側のみに凹部28cを形成してもよい。また、図29(c)に示す圧着端子10hのように、合わせ部が被覆圧着部24の下面側に位置する場合において、被覆圧着部24の下面側の一部にのみに凹部28dを形成してもよい。また、図29(d)に示す圧着端子10iのように、合わせ部が被覆圧着部24の上面側に位置する場合において、被覆圧着部24の上面側の一部にのみに凹部28eを形成してもよい。なお、凹部28b、28c、28d、28eの内面側には、凹凸は形成する必要がない。   When the mating portion is located on the lower surface side of the coated crimp portion 24 as in the crimp terminal 10f shown in FIG. 29A, the recess 28b may be formed only on the lower surface side of the coated crimp portion 24. Similarly, when the mating portion is located on the upper surface side of the coated crimping portion 24 as in the crimp terminal 10g shown in FIG. 29B, the recess 28c may be formed only on the upper surface side of the coated crimping portion 24. Good. In addition, as in the case of the crimp terminal 10h shown in FIG. 29 (c), when the mating portion is located on the lower surface side of the coated crimp portion 24, the concave portion 28d is formed only on a part of the lower surface side of the coated crimp portion 24. May be. Further, when the mating portion is located on the upper surface side of the coated crimp portion 24 as in the crimp terminal 10 i shown in FIG. 29 (d), the recess 28 e is formed only on a part of the upper surface side of the coated crimp portion 24. May be. In addition, it is not necessary to form an unevenness | corrugation in the inner surface side of the recessed part 28b, 28c, 28d, 28e.

また、凹部28、28b、28c、28d、28eは、長手方向の一部に一か所形成する例について示したが、長手方向に複数個所(例えば環状であれば、2重に)併設するように形成してもよい。   Moreover, although the recessed part 28, 28b, 28c, 28d, 28e was shown about the example formed in one place in a part of a longitudinal direction, it should be attached in multiple places (for example, if it is cyclic | annular) in the longitudinal direction. You may form in.

以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

例えば、上述した各実施形態における説明は、矛盾がない限り、他の実施形態にも適用される。また、各実施形態における各構成は、互いに組み合わせることができる。   For example, the description in each embodiment described above can be applied to other embodiments as long as there is no contradiction. Moreover, each structure in each embodiment can be combined with each other.

1、1a、1b…端子付き電線
10、10a、10b、10c、10d、10e、10f、10g、10h、10i…圧着端子
13a…凹部
13b…凹部
13c…凹部
14…窪み
20…ボックス部(端子接続部)
21…弾性接触片
22…底面部
23…導線圧着部
24…被覆圧着部
25…凸部
26…肩部
27…エア溜り
28、28a、28b、28c、28d、28e…凹部
30…電線接続部
31…開放部
32…封止部
33…内壁面
33a…防水用圧縮部
33b…導通用押圧部
34a…小径部
34b…大径部
35…仮想線
36…突起
37…合わせ部
40…トランジション部
41…水槽
42…レギュレータ
50…被覆電線
51…導体部
52…被覆部
61…第1圧着型
62…第2圧着型
66…金型角部
DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Electric wire with a terminal 10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i ... Crimp terminal 13a ... Recess 13b ... Recess 13c ... Recess 14 ... Depression 20 ... Box part (terminal connection Part)
DESCRIPTION OF SYMBOLS 21 ... Elastic contact piece 22 ... Bottom face part 23 ... Conductive wire crimping part 24 ... Cover crimping part 25 ... Convex part 26 ... Shoulder part 27 ... Air reservoir 28, 28a, 28b, 28c, 28d, 28e ... Concave part 30 ... Electric wire connection part 31 ... Open part 32 ... Sealing part 33 ... Inner wall surface 33a ... Compression part for waterproofing 33b ... Pressing part for conduction 34a ... Small diameter part 34b ... Large diameter part 35 ... Virtual line 36 ... Protrusion 37 ... Matching part 40 ... Transition part 41 ... Water tank 42 ... Regulator 50 ... Coated wire 51 ... Conductor part 52 ... Coating part 61 ... First crimping type 62 ... Second crimping type 66 ... Corner corner

Claims (7)

  1. 端子と被覆導線との接続方法であって、
    前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
    前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記圧着部を押圧する、上下に対向する上金型と下金型を用い、
    前記圧着部の外周面には、前記上金型と前記下金型の合わせ部に対応する位置にあらかじめ凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されず、
    前記圧着部に前記被覆導線を挿入し、
    前記上金型と前記下金型によって前記被覆導線の被覆部を前記圧着部で圧着することで、前記圧着部の外周面の前記合わせ部に対応する位置に突起が形成されることを防止可能であることを特徴とする端子と被覆導線の接続方法。
    A method of connecting a terminal and a coated conductor,
    The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part is sealed except for the part where the covered conductor is inserted,
    Using the upper mold and the lower mold facing the upper and lower sides to press the crimping part,
    A concave portion is formed in advance on the outer peripheral surface of the crimping portion at a position corresponding to the mating portion of the upper mold and the lower mold, and irregularities are formed on the inner peripheral surface of the crimping portion corresponding to the concave portion. Without
    Insert the coated conductor into the crimping part,
    It is possible to prevent a protrusion from being formed at a position corresponding to the mating portion on the outer peripheral surface of the crimping portion by crimping the coating portion of the coated conductor with the crimping portion by the upper die and the lower die. A method for connecting a terminal and a coated conductor, characterized in that:
  2. 前記凹部は、前記圧着部の合わせ部に沿って、長手方向に連続して形成されることを特徴とする請求項1記載の端子と被覆導線の接続方法。   The method for connecting a terminal and a coated conductor according to claim 1, wherein the concave portion is formed continuously in the longitudinal direction along the mating portion of the crimping portion.
  3. 前記凹部は、前記圧着部の周方向に連続して形成されることを特徴とする請求項1記載の端子と被覆導線の接続方法。   The method for connecting a terminal and a coated conductor according to claim 1, wherein the recess is formed continuously in a circumferential direction of the crimping portion.
  4. 被覆導線と端子とが接続されるワイヤハーネスであって、
    前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
    前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記圧着部の外周面には凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されず、
    前記圧着部に前記被覆導線を挿入して前記被覆導線の被覆部を前記圧着部で圧着することで、前記凹部が圧縮されることを特徴とするワイヤハーネス。
    A wire harness in which a coated conductor and a terminal are connected,
    The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part is sealed except for the part where the covered conductor is inserted,
    A concave portion is formed on the outer peripheral surface of the crimp portion, and no irregularities are formed on the inner peripheral surface of the crimp portion corresponding to the concave portion,
    The wire harness is characterized in that the recessed portion is compressed by inserting the covered conducting wire into the crimping portion and crimping the covering portion of the covered conducting wire with the crimping portion.
  5. 前記被覆導線はアルミニウム系材料で構成され、前記圧着部が銅系材料で構成されることを特徴とする請求項4記載のワイヤハーネス。   The wire harness according to claim 4, wherein the coated conductor is made of an aluminum-based material, and the crimping portion is made of a copper-based material.
  6. 被覆導線と接続される端子であって、
    前記被覆導線が圧着される圧着部と、端子本体と、を有し、
    前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記圧着部の外周面には凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されないことを特徴とする端子。
    A terminal connected to the coated conductor,
    A crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part is sealed except for the part where the covered conductor is inserted,
    A terminal, wherein a concave portion is formed on an outer peripheral surface of the crimping portion, and an unevenness is not formed on an inner peripheral surface of the crimping portion corresponding to the concave portion.
  7. 複数本のワイヤハーネスが束ねられたワイヤハーネス構造体であって、
    前記ワイヤハーネスは、被覆導線と端子とが接続されており、
    前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
    前記圧着部は、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記圧着部の外周面には凹部が形成され、前記凹部に対応する前記圧着部の内周面には凹凸が形成されず、
    前記圧着部に前記被覆導線を挿入して前記被覆導線の被覆部を前記圧着部で圧着することで、前記凹部が圧縮されることを特徴とするワイヤハーネス構造体。
    A wire harness structure in which a plurality of wire harnesses are bundled,
    The wire harness is connected to a coated conductor and a terminal,
    The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part is sealed except for the part where the covered conductor is inserted,
    A concave portion is formed on the outer peripheral surface of the crimp portion, and no irregularities are formed on the inner peripheral surface of the crimp portion corresponding to the concave portion,
    The wire harness structure is characterized in that the recessed portion is compressed by inserting the covered conductor into the crimping portion and crimping the covering portion of the covered conductor with the crimping portion.
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